Polydicyclopentadiene
[化] 聚双环戊二烯
🗣️ 情景例句
If you really mean it,
假如你是说真的，
What day is today?
今天星期几？
One moring she was working at her desk in the library when a boy came in.
一天早上，她正在图书馆里伏案工作，这时，一个男孩走进来。