英语语法分析

Man: he stops bitting me when he is happy.

男子：他停在下来，矗立在我面前的时候，他很高兴。

The tips of key pins are chiseled at various angles and mate with angled bitting cuts on the key.

牙花弹子的顶端被加工成不同角度的凿型，并和钥匙上的角度切削相配合。

This is because the key does not touch these areas as frequently and may never, depending on the key bitting.

这是因为钥匙不管使用多么频繁，也并不一定会接触珠子的这个部位。具体取决于钥匙牙花的高低。