吃透英语课本，提升在校竞争力
adv. 预先；提前
When you give a speech, it’s natural to feel nervous beforehand.
你在演讲之前感到紧张是很自然的。
The police need to be briefed beforehand on how to deal with this sort of situation.
需要事先告诉警察这种情况怎样处理。
We prepared everything beforehand.
我们事先准备好了所有东西。
adv.事先；预先
in advance
previously
ahead
ready
adj.提前的；预先准备好的
pre-arranged
