She unconsciously moved back a pace or two.
她下意识地向后退了一两步。
She unconsciously moved back a pace or two.
她下意识地向后退了一两步。
The policeman directed the crowd to move back for safety.
为了安全那个警察命令人群往后退。
The process beginnng from powder burning to the ejection pistons pushing out the bomb and its moving back was analyzed applying classical interior ballistics and gasdynamics theory.
给出了对
钩的实例计算，计算结果与试验结果基本相符。
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