Acetylenedinitrile
乙炔二氰, 丁炔二腈
??? 情景例句
Do I have any appointments?
我有什么約會(huì)么？
My brother is twice as tall as your sister.
我弟弟比你妹妹高一倍。
I have never been able to look at a snail since then.
從那以后，我再也不能看一眼蝸牛了。