| 单词 | egg case |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔cocoon〕A similar natural protective covering or structure, such as the egg case of a spider.茧状物：类似的自然保护覆盖层或结构，例如蜘蛛的蛋壳美国传统〔ootheca〕The egg case of certain insects and mollusks.卵囊：一些昆虫或软体动物的卵囊美国传统〔sea purse〕The purse-shaped egg case of skates, rays, or certain sharks.海袋：鳐鱼、鲂鱼或某些鲨鱼的袋状卵囊美国传统 |
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