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
there's no way we can complete this project.
我们无法完成这项计划。
Who minds his own business has no time to mind other folks.
为人只顾自己事，就无时间关心人。
The team started work on a new section inside the ship near the front.
工作队在靠近船头的船舱里的一段新区开始工作。