Midnight is used to describe something that happens or appears at midnight or in the middle of the night.
It is totally out of the question to postpone the midnight deadline.
延迟午夜的最后期限是根本不可能的。
Midnight is twelve o'clock in the middle of the night.
It was well after midnight by the time Anne returned to her apartment.
安妮回到公寓时早已过了午夜。
burn the midnight oil
If someone is burning the midnight oil, they are staying up very late in order to study or do some other work.
Chris is asleep after burning the midnight oil trying to finish his article.
克里斯在熬夜赶完他的文章后,现在睡着了。