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单词 卵黄腺
例句 DEFINITIVE EXAMPLES 权威例句〔vitellarium〕A group of glands that secrete yolk around the egg in those invertebrates, such as worms, whose eggs do not contain yolk.卵黄腺:一些脊椎动物中在卵周围分泌卵黄的一组腺,如其卵不包含卵黄的虫子美国传统
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