Chorionic sac
[医] 绒毛膜囊
🧩 词语组成解析
[医] 绒[毛]膜的
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
I would lke to place an order please.
我要下定单。
Do you have any plan for your career?
你对未来有什么计划吗？
and then there are three thousand million other Milky Ways, or galaxies, in the universe.
况且在宇宙中还有30亿个天河，即银河系。