Columbite
[建] 铌铁矿
🗣️ 情景例句
Scientific discoveries are ofter applied to industrial production methods.
科学新发现常应用于工业生产的方法。
Wit once bought is worth twice taught.
亲身一次的经验，抵得上老师两次的教导。
Great. Am I playing?
好极了。我参加吗？