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
It's not an important game, anyway.
话说回来， 这场比赛不重要。
An old physician, and a young lawyer.
医生年老的好，律师年轻的俏。
It was rather like an exhibition of prehistoric electronic equipment.
这儿倒像是在展览古老的电子设备。