Diolefins
二烯属; 二烯属烃
🗣️ 情景例句
It's just incredible!
简直是难以置信！
How long is Jones Boulevard?
琼斯大街有多长？
He is forever talking about the friendly people, the clean atmosphere, the closeness to nature and the gentle pace of living.
他滔滔不绝地大谈友好的农民，洁净的空气，贴近大自然的环境和悠闲的生活节奏。