Our room was at the back of the hotel.
我們的房間在旅館靠后面的地方。
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療。
I need time to get my wind back after that run.
我跑過之后需要時間喘口氣。
I think we should go back to first principles.
我認為我們應該回到基本原則上。
It was good to be back on dry land again.
回到陸地上真好。
Just get off my back, will you!
請別煩我了好嗎！