Vena contracta
[化] 流颈; 缩脉
🧩 词语组成解析
n. 静脉\\n[医] 静脉
🗣️ 情景例句
Don't worry. The traffic is very heavy at this hour.
别担心。这个时间交通很拥挤。
Stamp-collecting is a popular hobby.
集邮是一种普遍的业余爱好。
The letter x stands for an unknown number.
字母x代表未知数。