Alkynes
[化] 炔烃
🗣️ 情景例句
I think I've had enough of that sandwich.
我想我已经吃够了三明治。
In secondary school, children study history and geography.
中学的小孩会读历史和地理。
The holes are only borings, less than a foot in diameter.
这些洞只不过是一些钻孔，直径不到1英尺。