| let off |
免除 (任务或义务) |
I realized that having a new baby lets you off going to boring dinner parties.
我意识到，生了个孩子你就可以不参加无聊的宴会了。 |
| 宽恕，放过（犯错误或违法的人） |
As he has a good record, we shall let him off this time. |
| 引爆，释放（压力等） |
We always let off fireworks. 我们总是会放烟花。 |
| let down |
失望或辜负 |
- I expected him to help me, but he let me down.
- I was really let down by his broken promise.
|
| 放松或减弱 |
She let down her hair and relaxed after a long day at work. |
| 放下或降低 |
He let down the ladder for the firefighters to climb up. |
| 使下降 |
Please let down the curtain.请把窗帘放下来。 |
| let sb. in |
允许（空气、光线、水等）进入 |
If anyone knocks at the door when I am out,don' t let him in. |
| 使某人或某事陷入不利的境地 |
His careless actions let him in for a world of trouble with his boss. (他的粗心行为使他陷入了与老板的一系列麻烦之中。) |
| 与某人分享信息或允许其参与 |
It depends on how full the class is and how many additional students the professor is willing to let in.
这取决于课堂有多满，以及教授愿意让多少额外的学生加入。 |
| let out |
结束；放学；放假 |
After the long meeting, the chairman finally let out a sigh of relief. (长时间的会议结束后，主席终于松了口气。) |
| 放出去 |
Who let the dog out. |
