Prefacing
n. 前言；引语\\nvt. 为…加序言；以…开始\\nvi. 作序
🗣️ 情景例句
Food is necessary to maintain life.
食物是维持生命所必须的。
You have to be there half an hour before departure time.
你要在起飞前半小时到那里。
That was all she remembered.
她所记得的就是这些。