He removed the cigar, knocking off the ash.
他取出雪茄，敲掉烟灰。
A new study finds it's never too late to gain health benefits by knocking off such bad habits.
一项最新研究发现，要使健康受益，任何时候戒除这些坏习惯都为时不晚。
Kei Nishikori notched the biggest win of his career Saturday, knocking off top-ranked Novak Djokovic 2-6, 7-6(4), 6-0 in the Swiss Indoors Basel semi-finals.
锦织圭在周六取得了自己职业生涯最伟大的胜利，半决赛中，他以2:6, 7:6, 6:0的比分逆转现世界排名第一的塞尔维亚人德约科维奇。
Current thinking is that some 4 billion years ago, a Mars-sized object smashed into the proto-Earth, knocking off a chunk of planet that eventually formed into the moon.
现有理论认为在大约40亿年前，一个火星大小的天体撞击了原始地球，星球被装出的部分最终形成了现在的月球。
Maybe, because honestly, knocking off after eight hours probably won't earn me the corner office or the lucrative promotion.
也许是，因为说实话，工作八小时就下班，想搬进角落的高层办公室或升职加薪是不太可能的。
Maybe, because honestly, knocking off after eight hours probably won't earn me the corner office or the lucrative promotion.
也许是，因为说实话，工作八小时就下班，想搬进角落的高层办公室或升职加薪是不太可能的。
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