Fluorination
n. 氟化作用
🗣️ 情景例句
Weight: eight pounds six ounces.
体重： 八磅六盎司。
The students tumbled over each other as they got off the bus.
学生们下车的时候，由于拥挤一个叠一个的摔倒了。
so she went to fetch the porter from his basement.
于是她到地下室去找看门的人。