事先

prior

in advance

before(hand)

beforehand

by anticipation

事先[shìxiān]

-inadvance;beforehand;prior:
apremeditatedmurder;事先策划的暗杀
priorconsultations;exchangeofviewsinadvance;事先磋商
短语事先编辑pre-edit事先接近法preapproach事先试验pretest事先推断数量exantequantities

在生意上，你必须事先估计到你的竞争对手会如何行动。
In business, you've got to anticipate how your competitors will act.

我们事先就知道有这个问题。
We were aware of the problem beforehand.

我体谅你可能事先已另有承诺。
I appreciate that you may have prior commitments.

为了确定他在家，我事先打电话给他。
To make sure that he was at home, I called him up in advance.

买房子不事先估价是不明智的。
It would be unwise to buy the house before having it appraised.