Acetylenedinitrile
乙炔二氰, 丁炔二腈
🗣️ 情景例句
Would you prefer a window, aside or enter seat?
您喜欢靠窗、靠走道还是中间的位置？
A work ill done must be twice done.
未做好的活，需要重新做。
Fine, thank you. And you?
我很好，谢谢。你怎么样？