Columbium tetroxide
[化] 四氧化二铌
🧩 词语组成解析
n. [化]铌
n. 四氧化物\\n[化] 四氧化物
🗣️ 情景例句
The policemen could not cope with the crowds.
警察不能对付群众。
Don't give up.
不要放弃。
She does not know London very well, and she lost her way.
她对伦敦不很熟悉，因此迷了路。