Fluorosis
[化] 氟中毒\\n[医] 氟中毒, 斑釉
🗣️ 情景例句
This is too much.
太过分了。
I didn't know whether to send the letter airmail or not.
我不知道是否送航空邮件。
Maybe some folk songs to start with?
先演奏些民歌吗？