Allantoic sac
[医] 尿膜囊
🧩 词语组成解析
a. [动]尿囊的,尿囊内的,有尿囊的
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
How is everyone in your family?
全家都好吗？
I am at leisure now.
我现在有空。
I think we should do that another day. Then we can leave early in the morning before it gets too hot.
我想我们还是改天再去游览高坝吧。那样我们可以一清早就动身，免得天气太热。