embryo sac

• 胚囊

embryo sac的用法和样例：

例句

1. Abnormal development was observed at tetrad and mature embryo sac.
   在四分体和成熟胚囊时期观察到了异常发育现象。
2. Starch grains present in the embryo sac and placenta are utilized by the embryo.
   存在于胚囊和胎座中的淀粉粒为胚胎所利用。