shell 是什么意思？

贝壳, 甲壳

the hard protective outer case of a mollusk or crustacean

示例:• We collected beautiful sea shells on the beach.我们在海滩上收集了美丽的贝壳。• The hermit crab lives in a borrowed shell.寄居蟹住在借来的壳里。同义词:carapaceexoskeletontest