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Back pressure valve：回压阀

back-pressure regulator 回压调节器 | back-pressure valve 回压阀 | back-purge system 反冲洗系统

Back pressure valve：止回阀,背压阀

back pack pump tank fire extinguisher |[消]小型背负泵式灭火器 | back pressure valve|止回阀,背压阀 | back scattering|反向(后向)散射

back projection：反射影

back pressure 反压 | back projection 反射影 | back rest 靠背架

back projection operation：反投射运算

back print method 反面印刷法 | back projection operation 反投射运算 | back prop 后撑,后支柱

back rent：欠租

back pay 欠付工资 | back rent 欠租 | back spread 逆差价,缩差

back rent：欠租, 过期未付的房租

back release | 快门按钮 | back rent | 欠租, 过期未付的房租 | back resistance meter | 反向电阻测量计

back room：密室

back room boy 秘密工作人员 | back room 密室 | back slang 倒读隐语

back room：密室, 里屋

back roll | 重算, 重新运行, 反绕 后滚筒 | back room | 密室, 里屋 | back rooms | 商店的辅助库房

back room boy：秘密工作人员

back pay 欠薪 | back room boy 秘密工作人员 | back room 密室

put/get sb's back up"=make sb angry：触怒某人,使之生气

He put his back into studying for the exam. 他为考试尽全力学习. | 6."put/get sb's back up"=make sb angry 触怒某人,使之生气 | What he did at the party put her back up. 他在舞会上的所做所为惹恼了她....

The other day at the station, you said you had dreams. What is it you dream：那天在警局你说你做过梦 你梦到什么了

I'm to be decommissioned soon.|我就... | The other day at the station, you said you had dreams. What is it you dream?|那天在警局你说你做过梦 你梦到什么了? | I see you remain suspicious of me.|我觉得你还...

Schlegel：施勒格尔

早在19世纪前叶,例如施勒格尔(Schlegel)和贝尔德(Baird)这样的鸟类学家就强调种群样本采集或系列标本采集,以便进行个体的以及地理的变异研究. 鸟类学家与某些昆虫学家例如爱德华.波尔顿(Edward Poulton)和卡尔.乔丹(Karl jordan)一起倡导了生物学物种概念.