let in·to
phrasal verblet somebody in on something | let somebody into something
- (informal) to allow somebody to share a secret
告知，透露（秘密） - Are you going to let them in on your plans?
你是不是打算让他们知道你的计划呀？
- Are you going to let them in on your plans?
let something into something
- to put something into the surface of something so that it does not stick out from it
把…置入，把…嵌进（某物的表层） - a window let into a wall
嵌进墙壁的窗户
- a window let into a wall