Olefin hydrocarbon
[化] 烯烃
🧩 词语组成解析
n. 石蜡, 烯烃\\n[化] 烯烃
🗣️ 情景例句
Even when I have a cold, I still have a good appetite.
我就是感冒了，胃口也照样很好！
Would it be too much to ask you to respond to my question by tomorrow?
可以请你在明天以前回复吗？
She finished it at half past nine. She went to bed before a quarter to ten.
30 她完成了作业。她9：45之前上床睡觉。