Vanadium seldom forms mineral deposit. It is mainly exist in vanadium titanomagnetite coal gangue and claystone.钒一般很少单独形成矿床, 它主要赋存于钒钛磁铁矿、石煤矿、粘土岩中.Coupled unsaturated flow in claystone has high effect on strength and stab...
经过反省,他说自己对所作的评论感到非常后悔。On reflection, he says, he very much regrets the comments.作为音乐上的 “ 超人 ”, 他们自己当然也有过反省和解释.As'superhumans " in music, they made introspections and explanations about their deeds.他们到这时为止的经历为他提供了许多值...