不必要的的用法和樣例：
例句
-
勿做不必要的花費。
Don't involve yourself in unnecessary expense. -
這個(gè)指揮官讓士兵們冒不必要的危險真是太愚蠢了。
It's very foolish of the commander to expose his men to unnecessary risks. -
勿為不必要的問(wèn)題所累。
Don't burden yourself with unnecessary problems. -
你不應該讓士兵們冒不必要的危險。
You shouldn't expose the soldiers to unnecessary risks.
