Cardinal veins
[医] 主静脉
🧩 词语组成解析
n. 纹理；静脉（vein的复数）
🗣️ 情景例句
I need to fit a fourth operation into his schedule.
我得在他的工作表上再加第四个手术。
It's certainly a big improvement over yestterday.
肯定比昨天大有好转。
Yes, there is one.
是的，有一棵。