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
He is still unable to express himself in English.
他仍然不能用英语表达自己的意思。
As soon as you have drunk, you turn your back upon the spring.
忘恩负义。
Chen Wei returns a few moments later.
片刻之后，陈伟回来了。