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
You don't recognize me, do you?
你不认识我了， 是吗？
We're jumping about in excitement at the discovery.
我们因为这一发现而兴奋得手舞足蹈。
Its origin is still a mystery now.
它的起源至今仍是个谜。