Fluoniobate
氟铌酸盐
🗣️ 情景例句
Have you got any proofs?
你们有证据吗？
He plays violin just for enjoyment.
他拉小提琴只是为了自娱自乐。
It was necessary to recognize that these institutions which are based on the same premises,
必须认识到，这些建立在相同前提基础上的风俗，