There's a park over there. Let's walk in the park for a while.
那边有个公园。我们去散散步吧!
Don't be anxious if I'm late.
如果我回来晚些也不必担忧。
As far as I could see, it needed only a minor adjustment: a turn of a screw here, a little tightening up there, a drop of oil and it would be as good as new.