英语词汇fetal sac怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	fetal sac
释义	fetal sac 简明释义胎衣，胎囊网络释义 1 ?胎囊 ... dart sac 释义：射囊 fetal sac 释义：胎囊 dural sac 释义：硬脊膜囊 ... 双语例句 1 Fluid in the amniotic sac surrounding the fetus also contains fetal DNA. 羊膜中的液体包围这胎儿同样含有胎儿的DNA。
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