Ethynylation
炔化, 乙炔化作用
🗣️ 情景例句
So save your voices till then.
所以， 留着点嗓子。
Please open your baggage.
请把你的行李打开。
I supposed him to be very clever but he was in fact a fool.
我以为他很聪明，其实他是个蠢货。