trigger bar的用法和樣例：
例句
- To fire the gun, pull the trigger.
要開(kāi)槍就扣動(dòng)板機。 - The hunter pulled the trigger and stopped the deer in his tracks.
獵人扣板機，鹿應聲而倒。 - We found electrical burn marks on the roll bar and the car's undercarriage.
我們在車(chē)的車(chē)盤(pán)和下拉桿上都發(fā)現了有電灼的痕跡。
