Ethynation
乙炔化
🗣️ 情景例句
Can I help you?
我可以帮上忙吗？
It is incredible that he should have gone to live in such a dangerous country.
他竟然搬到那样危险的国家去住，实在令人无法相信。
'I've been coming up here night after night for weeks now.
“好几个星期了，我天天夜里到钟楼上来。