Indispensible
不可或缺
🗣️ 情景例句
Staff only.
员工专用。
Beggars must (should) be no choosers.
行乞的哪能挑肥拣瘦；饥不择食。
We only hope we won't have this kind of problem again.
我们仅希望不会再有这样的事情发生。