The cocking handle is attached to the right side of the bolt carrier and reciprocates when gun is fired.
在握把附于承运人的螺栓和右侧的回访时，枪开火。
The engine reciprocates the propeller.
引擎往复推动螺旋桨。
When someone reciprocates, treat it as a gift and thank them.
当有人回访时，把它视为一份小礼物并感谢他们。
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