Key vocabulary words with IPA pronunciation, definitions, example sentences, and interactive quizzes.
Phrases with type tags, bilingual definitions, usage notes, and example sentences.
A person or thing that is greatly valued by a nation for its cultural or historical significance.
A long-term change in the average weather patterns that have come to define Earth's local, regional and global climates.
To do something to help a situation or solve a problem.
Deserving the effort or money required to preserve or rescue it.
Easy to understand or appreciate, especially for people without specialized knowledge.
A person or organization that expresses a particular opinion or represents a specific cause with authority.
The long-lasting impact of a person's life, work, or achievements.