Embryonic sac
[医] 胚囊
🧩 词语组成解析
sac
[sæk]
n. （动植物组织中的）囊，液囊;
abbr. 缩写 = (US) Strategic Air Command 战略空军司令部。;
🗣️ 情景例句
Yes, I remember. You were a great help.
是的， 我记得。你帮了个大忙。
After that, what happened to him?
在那之后，发生了什么事情？
'Well, in that case, I prefer to stay on the bus,' I answered.
“好吧，既然如此，我还是留在车上吧。”我回答说。