Fluoridating
v. 在饮水中加少量之氟（以防儿童蛀牙）( fluoridate的现在分词 )
🗣️ 情景例句
Too long. Have a seat and I'll get you a cup of tea.
太久了。请坐，我来给你弄杯茶。
Every bean has its black.
人人有其缺点。
Lin Tao ran past him. He was first past the finishing line.
林涛超过了他。他第一个冲线。