基本解释n.碧玄岩(试金石)同根派生 英汉例句The native minerals originating from Tertiary basanite of Yaoshan formation,the placer is in water systems around Fangshan. 原生矿产于第三纪的尧山组玄武质碧玄岩中，砂矿则分布于方山周围的水系中。