Ethynylene
乙炔撑, 次乙炔基
🔁 扩展释义
【化】 亚乙炔基
🗣️ 情景例句
Then an adult must sign for you.
那就必须有一位成年人来替你签字。
We'd like to clear up some points connected with the technical part of the contract.
我们希望搞清楚有关合同中技术方面的几个问题。
It is a fine day today.
今天天气好。