Diacetylene
联乙炔, 丁二炔
🗣️ 情景例句
I can't believe it!
我简直不敢相信！
It is too late to come with the water when the house is burnt down.
马后炮。
In addition to all her other qualifications, Bessie was an expert cook.
贝西除了有各种本领以外，还是一个烹饪大师。