The shell of an animal such as a tortoise, snail, or crab is the hard protective covering that it has around its body or on its back. (动物的) 甲壳
noun [专属名词] 炮击，炮轰
Just as they were leaving the rebels started shelling. 他们正撤离时，叛军开始炮击。
verb [vt. 及物动词] 炮击；剥壳，脱壳，脱粒（shell 的现在分词）
We suffered weeks of heavy shelling. 我们遭受了几星期的密集炮击。
