英语词汇placental mammal是什么意思，placental mammal的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典

单词	placental mammal
释义	DEFINITIVE EXAMPLES 权威例句〔chorion〕The outer membrane enclosing the embryo in reptiles, birds, and mammals. In placental mammals it contributes to the development of the placenta.绒毛膜：在爬行类动物、鸟类及哺乳类动物中包含胚胎的外膜，在有胎盘哺乳动物中与胎盘的发育有关美国传统〔eutherian〕Of or belonging to the infraclass Eutheria, a division of mammals to which all the placental mammals belong.真哺乳亚纲的：关于或属于哺乳动物真兽亚纲的一个下纲，包括有胎盘哺乳动物美国传统
随便看	close around close around close arrest close arrest close at hand close at hand close at hand close at heel close attention close attention close attention close bed close behind close behind close behind close binder close bite close blockade close book close book close books close breach of close bread close breeding close but no cigar

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