1. 进入:let in 放进 | let into 进入 | let it all hang out 毫不保留地诉说
2. 让......进入:8.dye 染 | 9.let ... into 让......进入 | 10.prize 珍贵的,宝贵的
1. 使知道(秘密)
If you let someone into a secret, you allow them to know it.
e.g. I''ll let you into a little showbiz secret.
我来告诉你一个娱乐圈的小秘密。