back的意思：背部，背;腰背;脊柱;脊梁骨;后部;后面;末尾。
1、I'm having treatment for my back problem. 我正接受背部疾患的治疗。
2、New skin had to be grafted on from his back. 需从他的背部移植新皮肤。
3、There's room for three people in the back. 后排有可容三人的空位。
4、I need time to get my wind back after that run. 我跑过之后需要时间喘口气。
5、I think we should go back to first principles. 我认为我们应该回到基本原则上。
6、What time did you get back last night? 你昨晚什么时候回家的？
7、It was good to be back on land. 回到陆地上真好。
8、You have a strong case for getting your job back. 你有充分的理由要求恢复你的工作。
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