let in :v. 1.allow participation in or the right to be part of; permit to exercise the rights,functions,and responsibilities of 2.allow to enter; grant entry to 及物动词,让…进入 E.G. Let's open a window and let in some fresh air. 我们打开窗子,让一些新鲜空气进来吧. You should let me in. 你应该让我进来 希望对你有所帮助