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Back nine：后洞

Back door"走**"推杆(球从球洞后沿进洞) | Back nine后洞 | Back side洞球场的后洞

back-to-back arrangement：背对背式

Tandem arrangement:串联式 | Back-to-back arrangement:背对背式 | Fitting length:安装长度

Back-to-Back Devices：背对背设备

bonded transducer 接合式换能器 | back-to-back devices 背对背设备 | blind keyboard 盲键盘

back-to-back account：对开帐户

auxiliary account 辅助帐户 | back-to-back account 对开帐户 | bad and doubtful account 坏帐与呆帐

back space：退格符

back sight 过天顶测天瞄准器 | back space 退格符 | back space 退格

back space key：凿孔条倒退键

back slope || 后坡 | back space key || 凿孔条倒退键 | back space || 退位, (打字机)退格, 返回

back space file：回退文件

back space ==> 退位 | back space file ==> 回退文件 | back span ==> 反向间隔=>後ピッチ

Safe in the back seat：后面更安全

- we're fine back here. - Back's fine.|- 我们坐后面很好 - 后面就行 | Safe in the back seat.|后面更安全 | - Oh, my God. - what's up?|- 哦,天啊 - 怎么了?

back-to-school goods：学生用商品

back-to-front ratio ==> 反-正比 | back-to-school goods ==> 学生用商品 | back-track algorithm ==> 回溯算法

It was a flatbed truck with three huge sewer pipes on the back, so I spent::: It was days：那是一辆拖车,后面有三根大管子

and back up, and we got a rid... | It was a flatbed truck with three huge sewer pipes on the back, so I spent::: It was days|那是一辆拖车,后面有三根大管子 | in the back of this truck, in a sewer pipe, ...

colonial rule：殖民统治

colonial protectorate;殖民保护地;殖民被保护国;; | colonial rule;殖民统治;; | Colonial Secretary;辅政司;;

matrimonial agency：婚姻介绍所

21 deep love 深沉的爱情 | 22 matrimonial agency 婚姻介绍所 | 23 lover,sweetheart 情人