Acetylenedinitrile
乙炔二氰, 丁炔二腈
🗣️ 情景例句
and keep the cultural programs for our kids.
以便为我们的孩子保存文化活动。
Words pay no debts.
空言无补。
Yes, it is.It's very urgent.I feel awful. I have a terrible toothache.
是的，很急。我难受极了，牙痛得要命。