Pentynoic acid
[化] 戊炔酸
🧩 词语组成解析
🗣️ 情景例句
It doesn't mean you have to be a doctor.
这并不意味着你一定要当医生。
Which train do I take to Philadelphia?
去费城乘哪趟车？
We need the best possible quality.
我们要尽可能最好的品质。