ludwigite的音标：ludwigite的英式发音音标为：['lʌdwɪgaɪt]ludwigite的美式发音音标为：['lʌdwɪgaɪt]...

The industrial production, research & development of ludwigite are reviewed. The significance of development also stated.述国内对硼镁铁矿工业生产 和 科研开发情况,以及硼镁铁矿开发的意义....

n.硼镁铁矿...