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
The rules ought to be observed.
这些规则就予以遵守。
Ignorance is the mother of impudence.
厚颜无耻由于愚昧无知。
Certainly. The woolen ones are hanging here, and the cotton ones are hanging there.
当然欢迎。这儿挂着的是羊毛衫，那儿挂着的是棉毛衣。