Fluoridizer
氟化剂, 氟化器
🗣️ 情景例句
Can I spray a little on my wrist?
我能在我的手腕上喷一点吗？
He is attending a conference now.
他正在出席会议。
A Frenchman, for instance, might find it hard to laugh at a Russian joke.
譬如，法国人听完一则俄国笑话可能很难发笑。