They had to leave at midnight .
他们不得不半夜离开。
on the stroke of midnight/shortly after midnight
半夜 12 点整；午夜时分
She heard the clock strike midnight.
她听见钟敲子夜 12 点。
We have to catch the midnight train.
我们得乘半夜 12 点的火车。
1.午夜(的);漆黑(的)
1.twelve o’clock at night; used about something that happens or arrives at midnight
1.She favours a midnight blue pinstriped suit paired with a fitted satin shirt and black patent heels for her professional life.
她喜欢将深蓝色细条纹西服，配上合身的丝绸衬衫和黑色漆皮高跟鞋作为其职业装。
2.The Senate Majority Leader Harry Reid said the proposal was, in his words, "the only game in town" , and there will be a vote by midnight.
参议院多数党领袖里德称，用他的话说，唯一的办法就是在午夜之前针对该计划进行表决。
3.Her mother said that she had to be home by midnight.
她的母亲说她必须在午夜之前回到家。
4.Every night I drink at least a pot of white water, but do not get out of bed at midnight pee.
我每天晚上至少喝一壶白水，但从不半夜下床撒尿。
5.Or not prejudiced enough to scream when a Negro went toward her in a deserted subway station a few hours past midnight.
或者，在一个午夜已过多时，空旷无人的地铁车站，当一个黑人走向她，她根本就不会歧视到要大声喊叫的程度。
6.We were having such a wonderful time that nobody wanted to leave before midnight.
我们玩得如此高兴，以致没有一个人愿意在午夜前离去。
7.if I'm about to run out of gas at midnight on my way home? . . .
（如果我车子的油在半夜回家的路上快用完了该怎么办呢？）…
8.Well after midnight, they put me to bed, and such a comfort may be the greatest invention of mankind.
午夜后，他们让我上床睡觉，这种安慰大概是人类非常伟大的发明。
9.At the midnight, police first shot out the engine on the boat which he stole , then shouted to him in the public water of this area.
午夜时分，警方先是击中了他所盗船只的引擎，之后在该片公开水域向其喊话。
10.The winner of the award is decided by a public vote, to be registered before midnight, so it's up to all you True Blues.
本次获奖结果由公众投票决定，在午夜前仍然接受注册。作为真正的曼城球迷的你，赶快行动吧！