beforehand

中文意思

• adv. 预先，事先

英文释义

• adj. being ahead of time or need
• adv. ahead of time; in anticipation

例句

1. adv. 预先，事先

   If you want to attend the lecture, you need to register online beforehand.

   如果你想参加这场讲座，需要事先在网上注册。