recoil-operated meaning in Chinese

受反冲力而动作的

The m10 submachine gun was developed at around 1970 by gordon ingron at his military armament company hence the name mac , based at powder springs , georgia , usa . the m10 is a recoil - operated , select - fire submachine gun . the m10 fires from open bolt
当然，除了环境保护，人体内也需要环保，老师藉由食物金字塔教导小朋友如何藉由饮食来达到体内环保的主题教学，让孩子对饮食均衡的必要性有更深的概念。