Let us approach the subject from a different direction.
咱們從一個不同的角度來探討這個題目吧。
We were glad she let us know she was safe.
她告訴我們她平安無事，我們很高興。
Please let us know if you cannot attend the meeting.
你若不能參加會議，請通知我們。
If you remember anything at all, please let us know.
如果你還記得點兒什么請告訴我們。
Let us suppose, for example, that you are married with two children.
比方說，我們假設你成家了，還有兩個孩子。