Bef
abbr. 在…以前（before）
🗣️ 情景例句
Our plans have changed.
我们的计划已经改变。
And trade terminology in English is helpful in actual business negotiations.
对于实际的商务谈判是非常有用的。
In the conversion of saliva into poison, one might suppose that a fixed process took place.
人们可能认为，唾液转变成毒液，其中有固定的程序。