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You show promise as a musician but your lack of practice is holding you back：你有希望成為音樂家,但你懶于練習,使你毫無進展

*No one can hold back the wheel ... | *You show promise as a musician but your lack of practice is holding you back.你有希望成為音樂家,但你懶于練習,使你毫無進展. | 6.stay back or away; show unwillingn...

back siphonage：反虹吸能力

back saw 手锯 | back siphonage 反虹吸能力 | back square 曲尺

back sloper：整坡器,(筑路机的)刮沟刀

back slope 反坡,倾向坡,背坡 | back sloper 整坡器,(筑路机的)刮沟刀 | back space 退位

back somersault：后腾空翻

后排中锋 back row center | 后腾空翻 back somersault | 仰卧撑 back stoop falling

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 spattering：反电泼(离子蚀刻)

back side reference method 背侧基准法 | back spattering 反电泼(离子蚀刻) | back stamp 背款

back spin：回旋球(使用铁杆正确下击,球成反旋转)

Back sole 朝后杆头底部 | Back spin 回旋球(使用铁杆正确下击,球成反旋转) | Back swing 上杆

暗箭伤人(stab in the back 伤人的暗箭;诽谤)：stab someone in the back

speak of the devil -- 说曹操,曹操就到 | stab someone in the back -- 暗箭伤人(stab in the back 伤人的暗箭;诽谤) | stick together -- 团结一致;互相支持

And step back：后退

Thank you very much.|我非常感谢你 | And step back|后退 | step back... step back and turn.|后退,后退...再转身

tie-back stinger：回接插入管

tie-back spool 回接短管 | tie-back stinger 回接插入管 | tie-back stub liner 回接短尾管

dioptric：折射光学的

dioptre 屈光度 | dioptric 折射光学的 | dioptrics 折射光学

Saturdays are fun：星期六很有趣

6. Saturdays are fun.星期六很有趣. | fun 为不可数名词,"快乐,有趣",在此做表语. | That must be fun. 那一定很有趣.