noun 下载 🔗分享 外骨骼,外壳。 A hard outer structure that provides both structure and protection to creatures such as insects and Crustacea. Examples : "The discarded exoskeletons of cicadas clung to the tree bark in the park. " 公园里,蝉蜕下的外壳紧紧地附着在树皮上。 animal biology organism anatomy structure insect 与AI对话词汇游戏阅读练习