Noun:

1. hard outer covering or case of certain organisms such as arthropods and turtles

shelln.壳；炮弹；[计]外壳程序v.脱落；去壳；拾贝壳；炮轰

platen.碟；金属板；板块；盘vt.电镀；用金属板固定；为 ... 制印版；给 ... 装钢板

casen.例子；情况；案例；（辩论或诉讼）论据；箱v.装箱；踩点；仔细检查

coveringn.覆盖物adj.掩护的；掩盖的

sheathn.鞘；护套n.女式紧身衣服

outsideadv.在外面n.外面adj.外部的prep.在 ... 外边

exteriorn.外部；外表；外景adj.外部的；表面的；对外的；户外的

exoskeletonn.[动]外骨骼；皮骨骼

cuticlen.表皮；外皮；角质层

shieldn.盾；盾状物；防卫物vt.保护；庇护

1. He tickled gently at its glossy carapace,but the stubborn beetle would not budge.
   他轻轻地搔着甲虫光滑的壳，但这只固执的甲虫就是不动。