Let us approach the subject from a different direction.
咱们从一个不同的角度来探讨这个题目吧。
We were glad she let us know she was safe.
她告诉我们她平安无事，我们很高兴。
Please let us know if you cannot attend the meeting.
你若不能参加会议，请通知我们。
If you remember anything at all, please let us know.
如果你还记得点儿什么请告诉我们。
Let us suppose, for example, that you are married with two children.
比方说，我们假设你成家了，还有两个孩子。