Columbium dioxide
[化] 二氧化铌
🧩 词语组成解析
n. [化]铌
🗣️ 情景例句
What was your GPA last semester?
你上个学期的平均成绩是多少？
I'm sorry. I thought you wouldn't mind.
对不起，我还以为你不在乎呢。
After his attempt, Campbell was disappointed to learn that his average speed had been 299 miles per hour.
比赛结束后，坎贝尔非常失望地得知他的平均时速是299英里。