Ethynation
乙炔化
🗣️ 情景例句
Well done! Well done!
做得好！做得好！
I think your price is on the high side.
我认为贵方价格偏高。
I never heard of anyone making a'skeleton', as we were taught at school.
我从未听说过任何一位作家像我们在学校学的那样，动笔前先列什么提纲。