- back yard后庭;
- back up wall背墙;
- back upvi.<篮球>协防，补防;支持;堵塞;复制;往后退;
- back to square one问题回到原态，并没有解决;
- back surge逆哩;
- back stroke返回行[冲]程，逆行程;
- back streetn.小街;
- back siphonage反虹吸能力;
- back saw镶边手锯;
- back order延期交货;
- back onv.背靠;
- back heel pass[体]脚后跟传球;
- back elevation背视图;
- back down off放弃，让步，退却;
- back doorn.后门，秘密途径;
- centre of gravity重心;[化] 重心;
- Centre National du Commerce Exterieurn.法国对外贸易中心;
- centre mark定中心点，中心记号;
- go back as far as追溯到…;
- get back at<俚>实行报复;
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