Cave sickness
[医] 矿穴病(白垩矿工的一种发热性肺病)
🧩 词语组成解析
🗣️ 情景例句
Who's running against him?
谁与他竞选
I wrote several letters on my mother's behalf.
我代表我母亲写了几封信。
I like reading English books, but they're sometimes rather hard.
我喜欢看英语书，但有时候英语书相当难读。