Pettenkofer's theory
[医] 佩滕科弗氏学说(病菌通过地下水传播疾病)
🧩 词语组成解析
🗣️ 情景例句
Now you understand my feelings, Susan.
现在，你能理解我的感受了， Susan。
Your shoe lace is loose.
你的鞋带松了。
When I boarded the train, I could not help noticing that a great many local people got on as well.
上车后，我不禁注意到许多当地人也上了车。