Fluorate
氟酸盐
🗣️ 情景例句
I need to confirm my reservation.
我要确认我的预定。
After eating breakfast,I go back upstairs again.
在吃早餐以后，我再回楼上。
Some children were playing games on the bank and there were some people rowing on the river.
河岸上有些孩子正在玩耍，河面上有些人正在划船。