Perfluoroisobutylene
全氟異丁烯
??? 情景例句
What's your title?
你的頭銜是什么？
We had a fabulous time at the garden party.
我們在游園會上玩得很開心。
The elephant is not immediately susceptible to such blandishments, however,
然而大象不會立刻被這些討好的話感動，而