Ethynylation
炔化, 乙炔化作用
🗣️ 情景例句
I'm so in love with you.
我是如此爱你。
Quietness is best.
宁静最好。
He say he's just arrived in Scotland. He says he's staying at a Youth Hostel.You know he's a member of the Y.H.A.
他说他刚到苏格兰。他说他住在一家青年招待所。你知道，他是“青招协”的一个成员。