1.His misconduct let in a host of troubles.

1.他的不端行为招致不少麻烦。

2.I didn't know what I was letting myself in for.

2.我不知道会卷入么样的麻烦之中。

3.I hope you realize what you're letting yourself in for!

3.我希意识到给了多大的麻烦!

4.I fear for the city with this madman let loose in it.

4.让这位精神病患者出由活动，我真为这座城市担心。

5.I hope you've let none of your belongings in the hotel.

5.我希么东西也没忘在旅馆里。

6.Father open the window to let in the briskness of the morning air.

6.父亲打开窗户让早晨的清新空气进。

7.A bowman can let off six aimed shots in a minute, an arquebusier only one in two or three minutes, when he has gone through all his manual exercise carefully.

7.一名弓箭手可以每分钟瞄准射击六次，而一名火绳枪手只能每两三分钟射击一次，这还是在他严格按照程序操作的情况下!