A rifle is usually classified on the basis of the type of action it employs and on the size or calibre of ammunition it fires.
步枪通常根据其采用的击发原理以及子弹口径的大小来分类。It is possible that the gun can fire at any time, or even later when you release the safety, without your ever touching the trigger again.
枪支有时可能误击发，比如你刚刚解脱保险但还没有接触扳机的瞬间。Each pellet was placed in the end of a shotshell in place of the regular powder charge and primer.
每个点火药片放在实验弹的一端，代替正式的火药和击发药。The part of a gunlock that hits the primer or firing pin or explodes the percussion cap and causes the gun to fire.
击铁，击锤：枪机中用来击发底火或击动撞针以击穿火帽，使得枪炮得以发射的部分。After shooting, take out the auxiliary-bowstring firstly, then take out the main bowstring.
击发后，先拆下副弦，再拆主弦。The bomb's firing mechanism is activated by a time-clock.
炸弹的击发机构是由一个时间控制器控制的。The change of state results in an event being fired, calling a JavaScript function.
状态的改变会击发事件，调用一个JavaScript函数。The soldier told us where the firing mechanism of a rifle is.
那个士兵告诉我们哪儿是步枪的击发装置。Officials believe the bullet was fired in Charlotte, after passengers had exited the aircraft, one source said.
有官员认为那颗子弹是在夏洛特击发的，但发生在乘客下机后。