Polyuronic acid
[化] 多糖醛酸
🧩 词语组成解析
🗣️ 情景例句
When you go to a new school it takes a while to know the ropes.
到一所学校读书要花一段时间熟悉情况。
It is a small flock that has not a black sheep.
家家难免有败类。
The general manager.
我们总经理。