Diolefin
n. [化]二烯
🗣️ 情景例句
At any rate, we must go there.
不管怎么样，我们非去那里一趟不可。
You should wear a sweater, It's cold today.
你应该穿一件毛衣，因为今天很冷。
He was a famous professor of physics.
他是一位著名的物理教授。