let into 1. 允许进入 I'll let you into the house. 我会让你进屋的。 2. 把…插入，把…嵌入 let a pipe into the wall 把管子插进墙 a shelf let into the study wall 嵌进书房墙壁的书架 3. 使知道(秘密等) Shall we let Mary into our secret? 我们要把秘密告诉玛丽吗? 4. 攻击；拳打，责骂 He was so infuriated that without a word he let into the rascal. 他勃然大怒，二话不说就揍了那流氓一顿。