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
All right. Please hold two orchestra seats for us.
好，请帮我们保留两张前排的座位。
He is having a nightmare.
他在做着噩梦。
Not only had the poor man been arrested, but he had been sent to prison as well.
那个可怜的记者不仅被捕了，而且还被送进了监狱。