n. bolt ; gunlock
vt. lock
misc. rifle bolt ; firearm bolt
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咔嗒一声，猎人扳动了枪机。
There was a click as the hunter cocked his rifle.
youdao
离开射击地线时要打开枪机（枪栓）。
Release the bolt when stepping away from the firing line.
放开枪机即被封住，这样就可以正常使用。
It is sealed after loosing the trigger so that it can be used normally.
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