Pentahydroxyl compound
[化] 五羟基化合物
🧩 词语组成解析
🗣️ 情景例句
Are you sending it by regular or by speed?
你要寄平信还是快递？
The stations are always full of people.
火车站里经常挤满了人。
How extraordinary! I said. I think someone has been carving animals.
“多么神奇啊！”我说，“我想有人一直在刻这些动物。”