Vivianite
n. [矿]蓝铁矿
🗣️ 情景例句
What would you like?
你想要什么？
You don't have to pay any duty on personal belongings.
你不必在个人财产上付任何税。
What will be the population of these countries in the year 2000?
2000年不太发达国家的人口将是多少？