Perfluorodimethylcyclohexane
全氟二甲基环己烷
🗣️ 情景例句
I did not notice it until yesterday.
我一直到昨天才注意到它。
Please try to understand my position.
请了解我的立场。
Not only did I know her, but I was her best friend.
我不仅认识她，还是她最好的朋友。