Diolefins
二烯属; 二烯属烃
🗣️ 情景例句
now, I think we'd better get dressed, fellas.
现在我们最好去穿好衣服，各位。
Actions speak louder than words.
坐而言，不如起而行。
May I have a look at it, please?
我可以看一看吗？