let in

动词 let in:

1. allow participation in or the right to be part of; permit to exercise the rights, functions, and responsibilities of
   同义词：admit, include
2. allow to enter; grant entry to
   同义词：admit, allow in, intromit

1. The roof let in the rain.
   屋顶漏雨。
2. The interstices between the bricks let in cold air.
   冷空气透过砖缝进入室内。
3. Open the window and let in some fresh air.
   打开窗户，让新鲜的空气进来。
4. Are you going to let them in on the plans?
   你是否打算让他们知道这些计划？
5. This skirt needs letting in at the waist.
   这裙子的腰部需要改瘦。
6. You're letting yourself in for trouble by buying that rusty old car.
   你买那辆生了　的旧汽车是自找麻烦。