Polycyclopentadiene
聚环戊二烯
🗣️ 情景例句
No news is good news.
没消息就是好消息。
It's my treat this time.
这次我请客！
Great. Would you please let me know when you have a race?
太好了。请告诉我你们什么时候比赛，好吗？