let in

His misconduct let in a host of troubles.

他的不端行为招致不少麻烦。

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

我不知道会卷入什么样的麻烦之中。

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

我希望你意识到你给了多大的麻烦!

You must give the password before they’ll let you in.

你必须给出口令，他们才会让你去。

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

让这位精神病患者出来由活动，我真为这担心。

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

父亲打开窗户让早晨的清新空气来。

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.

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!