Defluorination
[化] 脱氟作用
🗣️ 情景例句
Oh, that's a very good school.
哦， 那是个好学校。
The man is surveying land for a national park.
这个人正在测量国家公园的土地
He usually stays at home with his pet dog.
他通常跟他的爱犬待在家里。