Columbium pentoxide
[化] 五氧化二铌
🧩 词语组成解析
n. [化]铌
n. [化]五氧化物
🗣️ 情景例句
I do his taxes every year.
我每年为他处理税务。
Excuse me for being late.
对不起我迟到了。
She looked everywhere for him but could not find him.
四处寻找，但没有找着。