Chlorofluorination
氯氟化(作用)
🗣️ 情景例句
Dearly beloved,
敬爱的人们，
Remember us on payday with a good bone.
发工资的日子可别忘了请客。
The English and Maths papers weren't easy enough for me.
英语和数学试题对我来说不很容易。