Polynorbornene
[化] 聚降冰片烯
🗣️ 情景例句
He's gone out of business.
他失业了。
He's a very hard man to please.
他是一个很难讨好的人。
Nigel is a very lucky man.But his wife isn't very lucky.She usually stays at home!
奈杰尔是个很幸运的人。但他的妻子运气不很好。他总是呆在家里！