Fluorochemicals
含氟化合物
🗣️ 情景例句
If you say so.
既然你这么说。
Many happy returns of the day.
祝您长寿。
Nearly a week passed before the girl was able to explain what had happened to her.
几乎过了一个星期，那姑娘才能讲述自己的遭遇。