Alkynes
[化] 炔烃
🗣️ 情景例句
Sorry, I couldn't help overhearing, did you mention something about...
对不起，我无意中听到你们的谈话，你们是不是提到...
This windows is junst as small as that one.
这扇窗户刚好和那扇一样小。
Don't dream away your time.
不要虚度光阴。