Dicyclic
a. [化]二环的,双环的
🗣️ 情景例句
He's coming over to talk about it.
他就是要来谈这个问题。
I was just about to call you.
我正准备打电话给你。
Let us suppose that a child suddenly crosses the road in front of you.
让我们假设一个小孩子突然在你前面穿过马路。