Pentoic acid
[化] 戊酸
🧩 词语组成解析
🗣️ 情景例句
I'm glad if you are, Harry.
假如你很确定， 我就高兴， Harry。
Perhaps not so.
也许不这样。
He turned on the light, but he couldn't see anyone. The thieves had already gone.
他开了灯，但不见一个人。小偷逃走了。