1. tracer bullet
   曳光弹，曳光弹头
   
2. bullet hole
   弹孔
   
3. bullet train
   n. (日本的)高速火车,高速客车
   

1. The bullet bedded itself in the wall.
   这颗子弹嵌进了墙内。
2. An enemy bullet sang past my ear.
   一颗敌人的子弹嗖地从我耳边擦过。
3. The bullet merely creased his shoulder.
   子弹只不过擦破了他肩部的皮肤。
4. The surgeon probed for the bullet in the man's back.
   外科医生在那男子的背部探寻子弹。
5. A sniper's bullet tore up a wall two inches above his head.
   一颗狙击手的子弹打烂了他头顶上方两英寸地方的墙头。

　3个名词解释