Let's go out to dinner. 我们出去吃晚饭吧。
Let us consider all the possibilities. 让我们来考虑一下各种可能性吧。
Let's not fight.
UK Don't let's argue. 咱们别争了。
Let's make sure she has a great birthday this year.
Let's just get to the top of this hill before we turn back.
See also: let verb (SUGGEST)