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Back-up light：倒车灯

Back-up buzzer 倒车报警器 | Back-up light 倒车灯 | Back wall 后围

Back-up protection：后备保护

61 Back-up over-speed governor 附加超速保护装置 | 62 Back-up protection 后备保护 | 63 Back-up ssystem 后备继电保护

Back-up protection：备用保护装置

back up plate 推靠板 | back up protection 备用保护装置 | back up store 后备存储器

Back-up buzzer：倒车报警器

Back squab 靠垫 | Back-up buzzer 倒车报警器 | Back-up light 倒车灯

back-up valve：升压阀[在低的环境温度下,为了降低空冷式冷凝器的能力,以维护一定排气压力的设施]

back-up 备用品[零件,设备] ;支持[撑] | back-up valve 升压阀[在低的环境温度下,为了降低空冷式冷凝器的能力,以维护一定排气压力的设施] | back valve 单向阀,止回阀

back-up area：备用堆置场

back up 垫板,背撑,(铸造用语)填背砂 | back up area 备用堆置场 | back up battery 后备电池

backdoor listing：借壳"上市;"买壳"上市

back tax 补缴税款 | backdoor listing "借壳"上市;"买壳"上市 | back-to-back credit 对开信贷

bagged cargo：貸裝貨

2.Back haul 回程托運 | 3.Bagged cargo 貸裝貨 | 4.Back to back charter在傭船契約與主傭船契約之條款完全一致

be on sb's back"=be ill in bed：卧病在床

He is such a bore,I should like to see the back of him. 他那么烦人,我真愿意他走掉. | 2."be on sb's back"=be ill in bed 卧病在床 | He was on his back for three months. 他卧病在床三个月.

before you get beat down：不然我打你

you better back the fuck up and get back in your car|你最好他妈的走回车上 | before you get beat down.|不然我打你 | just gimme my fuckin' money back, all right?|把钱还给我,明白不?

acetabular foramen：髀臼孔

\\"基节窝\\",\\"acetabular cups\\" | \\"髀臼孔\\",\\"acetabular foramen\\" | \\"髀臼窝;髋血凹\\",\\"acetabular fossa\\"

PRTSC PacketRadioTerminal：数据分组无线电发送终端

PRS PacketRadioStation 数据分组无线电发送站 | PRTSC PacketRadioTerminal 数据分组无线电发送终端 | PRV PacketRadioUnit 数据分组无线发送单元