Ethinylation
乙炔化
🗣️ 情景例句
He is an orphan, so he is not sure which family name he should have.
他是个孤儿，因而不知道他自己姓什么。
When the heart is full,, the tongue will speak.
胸有成竹，口若悬河。
He's gone to England with his family. He won't be back until January.
他和家人一起回英国了。要到元月份才回来。