Topfer's test
[医] 特普弗氏试验(胃酸定量法)
🧩 词语组成解析
🗣️ 情景例句
I'm a freelance photographer.
我是自由摄影师。
A sow, when washed; returns to the muck.
江山易改，本性难移。
A man was lying in the box on top of a pile of woolen goods.
箱内有一个人正躺在一堆毛织品之上。