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单词 有羊膜
例句 DEFINITIVE EXAMPLES 权威例句〔amniote〕Any of a group of vertebrates that have an amnion during embryonic development, including reptiles, birds, and mammals.脊椎动物,羊膜动物:任一种在胚胎发育期间有羊膜的脊椎动物,包括爬行动物、鸟类和哺乳动物美国传统
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