Our room was at the back of the hotel.
我们的房间在旅馆靠后面的地方。
There's room for three people in the back.
后排有可容三人的空位。
I'm having treatment for my back problem.
我正接受背部疾患的治疗。
I need time to get my wind back after that run.
我跑过之后需要时间喘口气。
I think we should go back to first principles.
我认为我们应该回到基本原则上。
It was good to be back on dry land again.
回到陆地上真好。
Just get off my back, will you!
请别烦我了好吗！