必要時(shí)的用法和樣例：
例句
-
必要時(shí)我可以在周末加班。
If need be, I can do extra work at the weekend. -
醫生認為必要時(shí)便動(dòng)手術(shù)－－但可能不致如此。
The doctors will operate if it proves necessary but it may not come to that. -
必要時(shí)這張桌子可以坐六個(gè)人。
We can get six people round this table at a pinch.
