Precardinal veins
[医] 前主静脉(胚)
🧩 词语组成解析
[医] 前主静脉的(胚)
n. 纹理；静脉（vein的复数）
🗣️ 情景例句
I frankly don't know what to do about it.
我真不知道该怎么解决。
I wonder if the dentist could fit me in early tomorrow?
请问明天一早牙科医生能抽空给我看一下吗？
No, he didn't!
没有！