Polycyclopentadiene
聚环戊二烯
🗣️ 情景例句
Our pleasure.
非常荣幸。
I don't want to be with either of you!
我不希望跟你们两人在一起。
but of course I cannot do so because I am a prisoner of the present-day world,
不过我是做不到的，因为我和你们大家一样，