Yolk sac
卵黄囊\\n[医] 卵黄囊
🧩 词语组成解析
yolk
[jok]
n. 蛋黄;卵黄;羊毛油脂;胚乳;
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
There are many natural catastroophes occurring in nature.
自然界里有很多自然灾害发生。
It's not my idea!
这主意不是我出的！
From these he can go on to appreciate more complex forms or combinations of several forms.
从这些形体出发，观赏者可进一步观察更为复杂的形体或若干形体的组合。