Chlorofluorination
氯氟化(作用)
🗣️ 情景例句
I'd like to make an appointment to discuss a question.
我想约个时间讨论个问题。
Will it be convenient for you to explain your plans to him?
你向他解释计划将是方便的吗？
Economy is one powerful motive for camping, since after the initial outlay upon equipment,
图省钱是露营的一个主要动机，因为除了开始时购置或是租借一套露营装备外，