Dipyrrole
α, α'-联吡咯
🗣️ 情景例句
If there is any cinnamon,
要是有的话，
And to stay ahead of the competition is to openly and freely exchange our opinions.
处于竞争领先地位的方法就是公开、自由交换我们的想法
Do you want a go?
你想试一下吗？