Pentoses
[医]戊糖（类），五碳糖（类）
🗣️ 情景例句
It's mostly young people who take part.
参加活动的绝大多数是年青人。
He's a student.
他是学生。
Good morning, Mr Coal. I hear that you are one of the best detectives in the capital.
早上好，科尔先生。我听说你是首都最优秀的侦探之一。