Pentoxide nitrogen
[医] 硝酸酐, 五氧化二氮
🧩 词语组成解析
n. [化]五氧化物
🗣️ 情景例句
You look very familiar. Have we been introduced before?
你看起来很面熟，我们以前互相介绍认识过吗？
Don't you care about this country's future?
难道你不会国家首任担忧吗？
What's the time?
几点了？