Indispensible
不可或缺
🗣️ 情景例句
I'd stay if they promoted me, But I can't see that happening.
假如他们提升我，我就留下来，但我看那是不可能的。
If he doesn't, will you wash the car?
如果他不，你会洗车吗？
He found it very difficult to get to sleep and he was rather angry with the man upstairs.
他觉得这样很难入睡， 他对楼上的人相当生气。