A protective covering, structure, or organ of an animal or a plant, such as teeth, claws, thorns, or the shell of a turtle.是什么意思_A protective covering, structure, or organ of an animal or a plant, such as teeth, claws, thorns, or the shell of a turtle.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句