Columbium pentoxide
[化] 五氧化二鈮
?? 詞語組成解析
n. [化]鈮
n. [化]五氧化物
??? 情景例句
You seem to have some reservations.
看起來你還有些猶豫。
Wouldn't you like some coffee?
你想要一些咖啡嗎？
The question was, which one?
問題是，哪一種氣體導(dǎo)致火災(zāi)呢？