Fluohydrocarbon
氟代烃
🗣️ 情景例句
She's really a good friend, isn't she?
她真是我的好朋友，不是吗？
It is my job to introduce the foreign guests who will be spending the week with us here.
我的责任是介绍这些将与我们共度这一周的外国客人们。
It will be about the same as it was last time.
大概和上回的订量一样。