Ball's valves
[医] 鲍尔氏瓣, 莫尔加尼氏瓣(肛瓣)
🧩 词语组成解析
n. 阀门；真空管；瓣膜（valve的复数）
🗣️ 情景例句
How was your trip?
你这一趟旅途还好吧？
Teacher. He is teaching.
老师。正在教书。
Nothing at all.
什么也看不见。