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
I need some new shoes to go with these pants.
我需要双新鞋来配这条裤子。
To operate a steam locomotive
驾驶蒸汽机车
I suddenly pressed the brake pedal and we were both thrown forward.
我突然用力踩紧刹车踏板，结果我俩的身体都向前冲去。