Penturonic acid
[化] 戊糖醛酸
🧩 词语组成解析
🗣️ 情景例句
Did she say why she had to leave today?
她说了她为什么今天非走不可吗？
May I ask you a question?
我能问你个问题吗？
No, there aren't (any).
不，没有。