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(guò)之后需要時(shí)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！