bullet与shell这两个名词均与枪弹有关。
bullet : 含义广泛，指各种枪用的子弹。
- bullet wounds
枪伤 - There were bullet holes in the door.
门上有弹孔。 - He was killed by a bullet in the head.
他头部中弹死亡。 - A bullet had lodged in the boy's leg.
一颗子弹嵌进了男孩的腿里。 - a bullet point
项目符号（通常为小黑圆点）（同 bullet point）
shell : 指发射后会爆炸的炮弹。
- If the shell had hit the boat, it would have blown it to pieces.
如果炮弹击中了小船，它早就被炸成碎片了。 - Artillery and mortar shells were landing in the outskirts of the city.
大炮和迫击炮弹落在城市周边地区。 - The men were suffering from shell shock.
这些男人患了炮弹休克症。
