Diolefins
二烯属; 二烯属烃
🗣️ 情景例句
and there's one person I haven't photographed in a long time.
而有一个人我已经很久没为她拍照了。
Once an opportunity slips away, it is gone for good.
机会一旦错过，永远不会再来。
At such times, justice acts like a living force.
在这种时候，正义像一种有生命的力量行使其职能。