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
OK.
好。
Poser!
耍大牌。
As soon as he opens the gate from the outside, he comes into the garden and waits until the gate shuts.
它从外面把门一打开，就走进花园，等着门自动关上。