Dipyrrole
α, α'-联吡咯
🗣️ 情景例句
It's the biggest company in the country.
它是全国最大的。
I will go to the sportsfield.
我将去运动场。
Sure, just drop in my office some time and pick them up.
没问题，什么时候到我办公室来拿都可以。