Amniotic sac
[医] 羊膜囊, 羊膜
🧩 词语组成解析
a. 羊膜的\\n[医] 羊膜的
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 thought he was retired
我原以为他退休了
She seems fond of him.
她似乎喜欢他。
Its wool, which had been dyed black, had been washed clean by the rain!
原来羊毛上染的黑色被雨水冲掉了！