Dipyrrole
α, α'-联吡咯
🗣️ 情景例句
By the way, what are you going to do on Christmas?
顺便问一下，圣诞节你打算做什么？
The father buys,the son bigs,the grandchild sells,and his son thigs.
父买、子修建、孙儿卖，重孙街上当乞丐。
No, what are they?
不知道。什么呢？