Caval valves
[医] 下腔静脉瓣
🧩 词语组成解析
[医] 腔静脉的
n. 阀门；真空管；瓣膜（valve的复数）
🗣️ 情景例句
I'm sorry you can't come with us, Susan.
很遗憾你不能同我们一起去， Susan。
I'm going to buy six inches.
我要买六英寸。
Modern industry is based on the conception of the maximum production at lowest cost,
以最低成本获取最多产品，