Fluoridizer
氟化剂, 氟化器
🗣️ 情景例句
He told me to call him about my project,
他叫我打电话给他， 跟他谈我的作品计划，
I'm afraid not. She doesn't have any openings in the morning.
恐怕不行。上午她没有空。
This is the point I wish to emphasize.
这就是我要强调的论点。