Defluorination
[化] 脱氟作用
🗣️ 情景例句
It was his first date in two years.
这是他两年来第一次约会。
The whole carton is packed with double straps, each corner of the carton consolidated with metal angles.
纸箱外加了两道箍，每个箱角都用金属角加固。
Don't touch anything unless your teacher tells you to.
除非老师允许，否则你不要动任何东西。