Valvulae venarum
[医] 静脉瓣
🧩 词语组成解析
[医] 瓣, 瓣膜
🗣️ 情景例句
Don't cross that bridge till you come to it.
没到河边，先别操心怎么过桥。
Could you tell me where is the first-aid room?
你能不能告诉我急诊室在哪里？
One Saturday afternoon, I hauled the machine into the garden and had a close look at it.
一个星期六的下午，我把割草机拉到了花园里，仔细检查了一番。