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
Of course you recognize him.
你当然认得他。
This is your last chance. I believe you can make it.
这时你最后的机会，我相信你会成功的。
Once he had done this, he had been able to turn on the supply.
一旦他接上了接头，他就能够打开供气阀。