EN： The Past Simple tense is used here to describe a completed experience or state in the past. 'Was' is the past form of 'is', and 'enjoyed' is the regular past form of 'enjoy'.
中文： 过去简单式 (Past Simple) 用于描述过去已经完成的经验或状态。'Was' 是 'is' 的过去式，而 'enjoyed' 是动词 'enjoy' 的规则过去式变化。
The movie was great and we enjoyed the popcorn.
那部电影很棒，我们很享受爆米花。
EN： The adverb 'really' is used as an intensifier before a verb to emphasize the degree of feeling or certainty.
中文： 副词 'really' (真正地/真的很) 在动词前作为强化词使用，用来强调感受的程度或肯定的语气。
I really like your new house.
我真的很喜欢你的新房子。
EN： In English-speaking cultures, it is common to give specific feedback about a meal. Instead of just saying 'the food was good', mentioning a specific dish like 'the pasta dish' shows genuine appreciation to the host or server.
中文： 在英语系国家，对餐点给予具体的反馈是很常见的。与其只说“食物很好吃”，提到具体的菜肴（如：那道意大利面）更能向主人或服务生表达真诚的赞赏。
EN： Tag Questions: These are short questions added to the end of a statement to confirm information or seek agreement. If the main statement is positive, the tag is negative (e.g., 'was' becomes 'wasn't it?').
中文： 附加问句：这是在陈述句末尾添加的简短问句，用于确认信息或寻求认同。如果主句是肯定句，附加问句则使用否定形式（例如：'was' 变成 'wasn't it?'）。
The weather is beautiful, isn't it?
天气很美，不是吗？
EN： Ellipsis in 'Me too': This is a common informal expression used to agree with a positive statement. It replaces the full sentence 'I enjoyed it too'.
中文： 省略句 'Me too'：这是一个常用的非正式表达方式，用于同意对方的肯定陈述。它取代了完整的句子 'I enjoyed it too'。
I love chocolate. Me too!
我喜欢巧克力。我也是！
EN： In English-speaking cultures, using tag questions like 'wasn't it?' is a polite way to engage the other person in conversation and confirm shared feelings about an experience, such as dining out.
中文： 在英语系国家中，使用像 'wasn't it?' 这样的附加问句是一种礼貌的社交方式，旨在邀请对方参与对话，并确认双方对某次经历（如外出用餐）有共同的感受。
EN： The preposition 'throughout' is used to indicate that something happened during the entire period of time or in every part of a place.
中文： 介系词 'throughout' 用于表示某事在整个时间段内或某个地点的每个部分持续发生。
It rained throughout the night.
雨下了一整夜。
EN： Compound Adjectives: Using multiple adjectives (friendly and helpful) to describe a single subject. They are often connected by 'and' when they carry equal weight.
中文： 复合形容词：使用多个形容词（friendly 和 helpful）来描述单一主体。当它们具有同等重要性时，通常由 'and' 连接。
The hotel room was clean and spacious.
饭店房间既干净又宽敞。
EN： In Western dining culture, praising the service is common when the staff goes beyond basic duties. Using 'friendly and helpful' suggests the waiter was proactive, which directly influences the tipping amount discussed later in the context.
中文： 在西方餐饮文化中，当服务人员表现超出基本职责时，给予称赞是很常见的。使用 'friendly and helpful' 暗示服务生表现积极，这直接影响了后续对话中提到的给小费金额。
EN： The modal verb 'should' is used here to make a suggestion or ask for an opinion about the best course of action.
中文： 助动词 'should' 在此处用于提出建议，或询问对方关于目前最佳行动方案的意见。
Should we leave a tip for the waiter?
我们应该给服务生小费吗？
EN： The adjective phrase 'ready to + verb' indicates that the subject is prepared or willing to perform a specific action.
中文： 形容词短语 'ready to + 动词' 表示主语已经准备好或愿意执行某个特定动作。
I am ready to order my food now.
我现在准备好要点餐了。
EN： In many English-speaking countries, you usually need to 'ask for the bill' rather than the waiter bringing it automatically as soon as you finish eating, as they don't want to rush you.
中文： 在许多英语系国家，你通常需要主动“要求账单”，服务生才不会在你一吃完就立刻送上账单，因为他们不想让客人感到被催促。
EN： The contraction 'I'll' (I will) is used here to express a spontaneous decision made at the moment of speaking, rather than a pre-planned action.
中文： 缩写 'I'll' (I will) 在此处用于表达在说话当下所做的即时决定，而非事先计划好的行动。
The phone is ringing. I'll answer it!
电话在响，我来接！
EN： The phrasal verb 'call (someone) over' means to ask or signal someone to come to where you are.
中文： 短语动词 'call (someone) over' 意指要求或示意某人来到你所在的位置。
She called the manager over to complain about the cold food.
她把经理叫过来，抱怨食物太冷了。
EN： In many Western restaurants, it is considered polite to catch a waiter's eye or give a small wave rather than shouting loudly to 'call them over'.
中文： 在许多西方餐厅，通过眼神交流或轻微挥手来吸引服务生的注意被认为是礼貌的，而不是大声喊叫来「把他们叫过来」。
EN： The phrasal verb 'come to' is commonly used to indicate the total amount or sum of a bill or calculation.
中文： 动词短语「come to」常用于表示账单或计算后的总金额、总计。
The grocery bill comes to fifty dollars.
杂货账单总计五十美元。
EN： The contraction 'Here's' (Here is) is a common way to present or hand something to someone.
中文： 缩写「Here's」(Here is) 是递给他人某物时常用的表达方式，意为「这是...」。
Here's your coffee, enjoy!
这是您的咖啡，请享用！
EN： In many English-speaking countries, the waiter brings the bill to the table. It is common to check the bill for accuracy before paying, and as mentioned in the context, tipping is often expected on top of this total.
中文： 在许多英语系国家，服务生会将账单送到桌边。在付款前检查账单金额是否正确是常见的做法，且如上下文所述，通常需要在总额之外另付小费。
EN： The auxiliary verb 'do' is used to form questions in the present simple tense for non-modal verbs. It precedes the subject 'you' followed by the base form of the main verb 'want'.
中文： 助动词 'do' 用于非情态动词的一般现在时疑问句。它置于主语 'you' 之前，后接主要动词的原形 'want'。
Do you need any help with your luggage?
你需要帮忙拿行李吗？
EN： The phrase 'split the bill' is a common collocation meaning to divide the total cost of a meal or service equally among the people involved.
中文： 'split the bill' 是一个常见的词组，意思是将餐点或服务的总费用在参与者之间平均分配（平分账单）。
We decided to split the bill to make it easier for everyone.
我们决定平分账单，好让大家方便。
EN： In many Western cultures, 'splitting the bill' (also known as 'going Dutch') is common among friends. However, as seen in the context, some prefer to pay separately based on exactly what they ordered to be more precise and fair.
中文： 在许多西方文化中，朋友之间“平分账单”（也称为 go Dutch）是很常见的。然而，如上下文所示，有些人更倾向于根据自己点的餐点“分开结账”，以求更加精确和公平。
EN： The conjunction 'because' is used to introduce a subordinate clause that provides the reason for the action in the main clause. It connects the result (paying separately) with the cause (ordering more).
中文： 从属连词“because”用于引导从句，提供主句动作的原因。它将结果（分开支付）与原因（点餐较多）连接起来。
I stayed at home because it was raining.
因为下雨，所以我待在家里。
EN： The modal verb 'should' is used to express a recommendation, suggestion, or what is considered the right thing to do in a specific situation.
中文： 情态助动词“should”用于表达建议、提议，或是在特定情况下被认为是正确地做法。
We should leave early to avoid the traffic.
我们应该早点出发以避开车潮。
EN： In many Western cultures, 'splitting the bill' (Go Dutch) is common among friends. However, if one person orders significantly more expensive items, it is considered polite and 'fair' for that person to offer to pay separately to avoid others subsidizing their meal.
中文： 在许多西方文化中，朋友间“分账”(Go Dutch) 很常见。然而，如果其中一人点了明显较贵的餐点，该人主动提议分开计算（按个人点餐付费）会被视为有礼貌且“公平”的做法，以避免他人负担自己的餐费。
EN： The modal verb 'can' is used here to ask for permission or to inquire about possibility. In a question, 'can' moves to the front of the subject.
中文： 情态助动词 'can' 在此处用于请求许可或询问可能性。在疑问句中，'can' 会移至主语之前。
Can we sit by the window, please?
请问我们可以坐在窗边吗？
EN： The preposition 'with' is used to indicate the instrument or method used to perform an action (paying with a card).
中文： 介词 'with' 在此处用于表示执行动作所使用的工具或方式（使用信用卡支付）。
You can open the door with this key.
你可以用这把钥匙开门。
EN： In many Western countries, splitting the bill (often called 'going Dutch') is common among friends. However, as seen in the context, if one person orders significantly more, it is considered 'fair' to pay separately for what each person actually consumed.
中文： 在许多西方国家，朋友间平分账单（通常称为 'going Dutch'）很常见。然而，如上下文所示，如果其中一人点的餐点明显较多，分开支付各自实际消费的金额会被视为更“公平”的做法。
EN： The word 'however' is used as a relative adverb here to mean 'in whatever way' or 'no matter how'. It introduces a subordinate clause that functions as an adverbial modifier for the verb 'split'.
中文： 这里的 'however' 作为关系副词，意思是“无论以何种方式”或“随便如何”。它引导一个从句，用来修饰动词 'split' 的方式。
You can decorate the room however you like.
你可以随心所欲地布置房间。
EN： The modal verb 'can' expresses ability or possibility. In a service context, it is often used by staff to indicate their willingness and capability to fulfill a customer's request.
中文： 助动词 'can' 表示能力或可能性。在服务情境中，服务人员常用它来表示有能力且愿意满足顾客的要求。
I can change your seat if you prefer a window view.
如果您偏好靠窗的座位，我可以帮您更换。
EN： In Western restaurants, splitting the bill (often called 'going Dutch' or 'separate checks') is a very common request. Modern Point of Sale (POS) systems allow servers to easily divide items by person or by a specific amount, so don't hesitate to ask.
中文： 在西方餐厅，拆分账单（通常称为 'going Dutch' 或 'separate checks'）是非常常见的要求。现代的餐饮收银系统 (POS) 允许服务生轻松地按人头或特定金额拆分项目，因此请尽管提出要求。
EN： The word 'including' is a present participle used as a preposition to introduce a part of a whole. It indicates that the following noun is part of the total amount or group mentioned previously.
中文： 'including' 是现在分词当作介词使用，用来引出整体中的一部分。它表示后接的名词已包含在先前提到的一组总额或群体中。
The price is thirty dollars, including tax.
价格是三十美元，包含税金。
EN： The word 'so' is used here as a coordinating conjunction to introduce a logical conclusion or a result based on the previous conversation about splitting the bill.
中文： 这里的 'so' 作为等立连词，用来引出基于先前关于分账讨论后的逻辑结论或结果。
I'm tired, so I'm going to bed.
我累了，所以我要去睡觉了。
EN： In many Western cultures, especially among friends, it is common to 'split the bill' (each pay half) or 'pay separately' (each pay for what they ordered). Sarah chooses to pay separately because her order was more expensive, which is considered a polite and fair gesture.
中文： 在许多西方文化中，朋友聚餐时「分账」(split the bill，各付一半) 或「分开付」(pay separately，各付各的) 很常见。Sarah 选择分开付是因为她点的东西比较贵，这被视为一种礼貌且公平的做法。
EN： Possessive Pronouns: 'Mine' is used to replace 'my bill' or 'my total' to avoid repetition. It functions as the subject of the sentence here.
中文： 所有格代名词：'Mine' 用来代替 'my bill' 或 'my total' 以避免重复。在此句中，它充当句子的主语。
Your coffee is hot, but mine is cold.
你的咖啡是热的，但我的是冷的。
EN： Adverb 'Only' for Limitation: The word 'only' is used as an adverb to restrict the scope of the cost to just the main course, excluding other items like drinks or desserts.
中文： 副词 'Only' 的限定用法：'only' 在此作为副词，用来将费用的范围限制在「主菜」，排除饮料或甜点等其他项目。
I only have five dollars in my wallet.
我钱包里只有五美元。
EN： In Western dining culture, 'splitting the bill' or 'paying separately' is very common among friends. 'Main course' refers to the primary dish of the meal, which is usually the most expensive part compared to appetizers or desserts.
中文： 在西方餐饮文化中，朋友之间“分摊账单”或“分开结账”是非常普遍的。'Main course'（主菜）是指一餐中的主要菜肴，通常比前菜或甜点贵。
EN： The modal verb 'should' is used to ask for advice or to discuss if something is a good idea or a duty.
中文： 情态助动词 'should' 用于征求建议，或讨论某事是否为好主意或义务（应该）。
Should we bring a gift to the party?
我们应该带礼物去参加派对吗？
EN： The preposition 'for' is used here to indicate the reason or cause for an action (leaving a tip).
中文： 介词 'for' 在此处用于表示某个动作（给小费）的原因或理由。
I thanked him for his help.
我因为他的帮助而感谢他。
EN： In North America, tipping is expected in sit-down restaurants. A standard tip is usually 15-20% of the total bill before tax. Not leaving a tip is considered very rude unless the service was exceptionally poor.
中文： 在北美，在有服务生送餐的餐厅用餐通常必须给小费。标准小费通常是税前总额的 15-20%。除非服务极差，否则不给小费会被视为非常失礼的行为。
EN： The use of 'Standard Practice' as a Subject Complement: In this sentence, 'standard practice' follows the linking verb 'is' to describe the subject 'fifteen to twenty percent'. It refers to a common or expected way of doing something.
中文： 使用“Standard Practice”作为主语补语：在此句子中，“standard practice”接在连系动词“is”之后，用来描述主语“fifteen to twenty percent”。它指的是某种常见或预期的做法。
Wearing a suit to a job interview is standard practice in this industry.
在面试时穿西装是这个行业的标准做法。
EN： Prepositional Phrases as Adverbials: 'In this country' is a prepositional phrase that functions as an adverbial of place, setting the context for the entire statement.
中文： 介词短语作为副词用法：“In this country”是一个介词短语，充当地点副词，为整个陈述句设定了背景语境。
In this city, public transportation is very efficient.
在这个城市，公共交通非常有效率。
EN： In many Western countries, especially the United States and Canada, tipping is not just a gesture of kindness but a social obligation. Service workers often receive a lower base wage and rely on tips for their livelihood. 15-20% is the standard expectation for good service in restaurants.
中文： 在许多西方国家（特别是美国和加拿大），给小费不仅是善意的表现，更是一种社会义务。服务业人员的底薪通常较低，主要依靠小费维持生计。在餐厅，15% 到 20% 是对良好服务的标准预期。
EN： The future simple tense 'will' (contracted as 'I'll') is used here to express a spontaneous decision made at the moment of speaking.
中文： 未来简单式 'will'（在此缩写为 'I'll'）用于表达在说话当下所做的即时决定。
I'll take the blue shirt instead of the red one.
我会拿这件蓝色衬衫而不是红色的。
EN： The preposition 'as' is used to describe the role or function of something—in this case, the purpose of the ten dollars.
中文： 介词 'as' 用来描述某事物的角色或功能，在此句中指这十美元的用途是作为小费。
She works as a teacher in a local high school.
她在当地一所高中担任老师。
EN： In the United States and Canada, tipping is expected in sit-down restaurants. A tip of 15-20% is standard. Adding a specific dollar amount (like $10) is a common way to calculate a generous tip quickly.
中文： 在美国和加拿大，在内用餐厅用餐通常需要支付小费。15% 到 20% 是标准比例。直接增加一个整数金额（如 10 美元）是快速计算慷慨小费的常见方式。
EN： The Present Continuous tense (am/is/are + V-ing) is used here to express an immediate intention or an action about to happen in the very near future.
中文： 现在进行式 (am/is/are + V-ing) 在此处用于表达目前的意图，或即将发生的动作。
I'm paying for the coffee this time.
这次咖啡由我来付钱。
EN： Non-defining relative clauses use 'which' to provide extra information about the preceding clause or noun. It is always preceded by a comma.
中文： 非限定用法关系从句使用 'which' 来对前面的从句或名词提供额外补充说明。在 'which' 之前通常会加上逗号。
He gave me a tip, which was very kind of him.
他给了我小费，这展现了他的慷慨。
EN： In the United States and Canada, tipping is a standard expectation in sit-down restaurants. 15-20% is considered the normal range for good service. Leaving exactly 20% is often seen as a sign of complete satisfaction with the service provided.
中文： 在美国和加拿大，在坐下来用餐的餐厅给小费是标准做法。良好服务的小费范围通常在 15-20% 之间。留下刚好 20% 的小费通常被视为对所提供服务非常满意的表现。
EN： The use of 'both' after a pronoun (like 'you both') is an appositive structure used to specify that the action or feeling is directed toward two people specifically.
中文： 在代词后使用 'both'（如 'you both'）是一种同位语结构，用来明确表示该动作或情感是针对特定的两个人。
I hope you both have a wonderful trip.
我希望你们两位旅途愉快。
EN： The adverb 'really' is used as an intensifier before a verb to emphasize the sincerity or depth of a feeling.
中文： 副词 'really' 用作动词前的强化词，用来强调情感的真诚度或深度。
She really likes the gift you bought her.
她真的很喜欢你买给她的礼物。
EN： In North American culture, leaving a generous tip (15-20% or more) is highly valued as servers rely on tips for their livelihood. Using the word 'generosity' specifically acknowledges that the customers left a good tip.
中文： 在北美文化中，留下优渥的小费（15-20% 或更多）是非常受重视的，因为服务生的生计依赖小费。使用 'generosity'（大方/慷慨）这个词，特别点出了顾客留下了不错的小费。
EN： The word 'both' is used to emphasize that two specific things (food and service) share the same quality. It is placed after the verb 'to be' (were) when it refers to the subject.
中文： 单词 'both' 用于强调两个特定事物（食物和服务）具有相同的品质。当它指代主语时，通常放在 be 动词（在此为 were）之后。
The hotel and the beach were both beautiful.
饭店和海滩都很漂亮。
EN： The past simple tense 'were' is used here because the speaker is reflecting on the dining experience that is concluding.
中文： 这里使用过去简单式 'were'，是因为说话者正在回顾即将结束的用餐体验。
The movies were very long last night.
昨晚的电影都很长。
EN： In Western dining culture, it is common to give specific positive feedback to the server if the experience was good, which often correlates with the tipping custom mentioned in the context.
中文： 在西方餐饮文化中，如果用餐体验良好，通常会向服务生提供具体的正面反馈，这通常与上下文提到的打赏（小费）习俗相互呼应。
EN： The Future Simple tense (will + base verb) is used here to express a firm intention or promise made at the moment of speaking.
中文： 未来简单式（will + 原型动词）在此处用于表达说话当下所做的坚定意图或承诺。
I will call you as soon as I arrive.
我一到达就会打电话给你。
EN： Adverb Placement: The adverb 'definitely' is placed between the auxiliary verb 'will' and the main verb 'come' to emphasize the certainty of the action.
中文： 副词位置：副词“definitely”（肯定地）放在助动词“will”与主要动词“come”之间，用以强调动作的确定性。
She will definitely enjoy the movie.
她肯定会喜欢这部电影的。
EN： In Western restaurant culture, telling the staff you will 'come back soon' is considered a high compliment and is often said when the dining experience was exceptional.
中文： 在西方餐厅文化中，告诉工作人员你「很快会再回来」被视为极高的赞赏，通常是在用餐体验非常出色时才会说的话。
EN： The phrase 'to hear' is an infinitive used as an adjective complement. It explains why the speaker feels 'wonderful'.
中文： 不定词 'to hear' 作为形容词补语，用来解释为什么说话者感到 'wonderful'（太好了）。
I am happy to meet you.
我很开心见到你。
EN： The imperative sentence 'Have a...' is used here to express a wish or a polite command for the listener's benefit.
中文： 祈使句 'Have a...' 在此处用于表达祝愿，或为了对方的利益而提出的礼貌建议。
Have a safe trip!
祝你旅途平安！
EN： In Western service culture, it is standard for staff to use enthusiastic adjectives like 'wonderful' or 'excellent' to validate a customer's positive feedback and end the interaction on a high note.
中文： 在西方服务文化中，服务人员通常会使用如 'wonderful' 或 'excellent' 等热情的形容词来肯定客人的正面回馈，并以愉快的语气结束互动。
EN： The Past Simple tense is used to describe actions that were completed at a specific time in the past. In this sentence, 'learned' indicates the action happened earlier today.
中文： 过去简单式（Past Simple）用于描述在过去特定时间完成的动作。在此句子中，'learned' 表示这个学习的动作发生在今天的早些时候。
I learned a new recipe yesterday.
我昨天学到了一个新食谱。
EN： Adjective placement: In English, adjectives like 'important' usually come before the noun they modify. However, when modifying indefinite pronouns like 'something', 'anything', or 'nothing', the adjective must follow the pronoun.
中文： 形容词位置：在英语中，像 'important' 这样的形容词通常放在修饰的名词之前。然而，当修饰 'something'、'anything' 或 'nothing' 等不定代名词时，形容词必须放在代名词之后。
I want to tell you something interesting.
我想告诉你一些有趣的事情。
EN： In North America, tipping is not just a gesture of gratitude but a significant part of a server's income. Standard tips range from 15% to 20% of the total bill before tax.
中文： 在北美，给小费不仅是表达感谢，更是服务生收入的重要组成部分。标准小费通常为税前总额的 15% 到 20%。
EN： The sentence uses a Noun Clause structure where 'that was so interesting' acts as a relative clause modifying the pronoun 'what'. This structure allows the speaker to add specific details to the object of the question.
中文： 本句使用了名词性从句结构，其中“that was so interesting”作为关系从句，用来修饰疑问代词“what”。这种结构让说话者能针对问题的对象添加具体细节。
What did you see that was so scary?
你看到了什么那么可怕的东西？
EN： The auxiliary verb 'did' is used to form a question in the Simple Past Tense. When 'did' is used, the main verb (learn) must return to its base form.
中文： 助动词“did”用于构成过去简单式的疑问句。当使用“did”时，主要动词（learn）必须恢复为原形。
Did you learn how to cook pasta?
你学会如何煮意大利面了吗？
EN： In many Western cultures, especially in the US, tipping is not just a gesture of kindness but a necessary part of a server's income. Asking 'what was interesting' about a custom shows an openness to cultural differences rather than judging them.
中文： 在许多西方文化中（特别是美国），给小费不仅是善意的表现，更是服务生收入的重要组成部分。询问某个习俗“有趣之处”展现了对文化差异的开放态度，而非主观评判。
EN： The adverb of frequency 'usually' is placed before the main verb 'tip' to describe a general habit or routine.
中文： 频率副词 'usually' (通常) 放在一般动词 'tip' 之前，用来描述一般的习惯或常态。
I usually drink coffee in the morning.
我通常在早上喝咖啡。
EN： The conjunction 'because' is used to introduce a subordinate clause that provides the reason for the action in the main clause.
中文： 连接词 'because' (因为) 用于引导从句，说明主句动作发生的原因。
She stayed home because it was raining.
因为下雨，她待在家里。
EN： Tipping customs vary significantly worldwide. In many European and Asian countries, a service charge is already added to the bill, or staff are paid a full living wage, making tipping optional. In North America, however, tips are a primary source of income for servers.
中文： 世界各地的小费习俗差异很大。在许多欧洲和亚洲国家，服务费通常已包含在账单中，或者员工领有足够的底薪，因此小费是自愿性质的。然而在北美，小费是服务人员的主要收入来源。
EN： The phrasal verb 'depend on' means to rely on someone or something for support or necessity. It is followed by a noun or a gerund.
中文： 动词短语 'depend on' 意为「依靠」或「依赖」某人或某事以获得支持或满足需求。其后接名词或动名词。
Children depend on their parents for food and clothing.
孩子们在衣食方面依赖他们的父母。
EN： The word 'quite' is a degree adverb used to emphasize an adjective. It means 'to a certain extent' or 'very'.
中文： 单词 'quite' 是一个程度副词，用于强调形容词。它的意思是「相当地」或「非常」。
The movie was quite interesting, but it was too long.
这部电影相当有趣，但太长了。
EN： In the United States and Canada, tipping is not just a gesture of thanks but a significant part of a server's wage. Many service workers receive a 'tipped minimum wage' which is lower than the standard minimum wage, making tips essential for their livelihood.
中文： 在美国和加拿大，给小费不仅仅是表示感谢，更是服务生薪资的重要组成部分。许多服务业人员领取的「含小费最低工资」低于标准最低工资，因此小费对他们的生活至关重要。
EN： Indirect Questions: When a question (Why is tipping important?) is embedded within a statement, the word order changes to Subject + Verb (why tipping is...).
中文： 间接问句：当一个疑问句（为什么给小费很重要？）嵌入在一个陈述句中时，语序会改为「主语 + 动词」（why tipping is...）。
I don't know where the station is.
我不知道火车站在哪里。
EN： Gerund as Subject: The word 'tipping' is a gerund (verb + -ing acting as a noun), serving as the subject of the subordinate clause.
中文： 动名词当主语：单词 'tipping' 是一个动名词（动词 + -ing 作为名词使用），在从句中担任主语的角色。
Learning English is fun.
学习英文很有趣。
EN： In North America, tipping is not just a courtesy but a significant part of a server's income, as their base wage is often lower than the minimum wage. 15-20% is the standard expectation for good service.
中文： 在北美，给小费不仅是一种礼貌，更是服务生收入的重要组成部分，因为他们的底薪通常低于最低工资。对于良好的服务，通常预期支付 15-20% 的小费。
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