Propiolaldehyde
[化] 丙炔醛
🗣️ 情景例句
And if I think about it long enough, you never know ...
如果我一直考虑下去的话 ，说不定……
I'm glad our negotiation has come to a successful conclusion.
我很高兴这次洽谈圆满成功。
but where had it come from?
但它是从哪儿来的呢？