Acetylenedinitrile
乙炔二氰, 丁炔二腈
🗣️ 情景例句
What are you going to do?
你打算读什么？
How's your brother?
你的兄弟好吗？
He's only forty-one years old, and he has already been to nearly every country in the world.
他只有41岁，但他却过世界上几乎每一个国家。