英语词汇gestational 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	gestational sac
释义	gestational sac 简明释义孕囊：胚胎非常早期的胚胎周围的子宫内结构，可以用来确定是否存在子宫内妊娠。网络释义 1 ?孕囊孕囊双语例句 1 The positive predictive values (PPV) of the PCR and virus isolation assessments performed in all 50 pregnancies (51 gestational sacs) were 92% and 93.7%, respectively. 聚合酶链反应和病毒分离培养法对50例孕妇（怀51胎）进行评价的阳性预测值分别为92.0%和93.7%。
随便看	regular procedure regular production regular production regular profile regular program regular project regular projection regular projective transformation regular pulse regular pulse excitation regular pulse linear predictive coding regular pyramid regular quadratic space regular quadrat method regular quantity regular ramification regular random process regular rate regular rate and rhythm regular rational mapping regular rayon regular recourse regular reflectance regular reflection regular reflection factor

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