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
I was very sad indeed to hear about it.
听了这件事，我的确非常难过。
When did you graduste?
你什么时候毕业的？
In the struggle, the strap broke and, with the bag in their possession, both men started running through the trees.
在争抢中，手提包的带断了，包落入这两个人手里，他们拔腿跑进了树林。