A look at the composition of tiny crystals trapped inside erupted lava and ash at yellowstone has suggested a partial answer , by providing new insight into how magma forms 藉由研究黄石国家公园喷发熔岩与火山灰内的微小晶体,这个疑问获得了部份解答,也使我们对于岩浆的形成机制有了新的见解。
For enhancing the hardness and achieving the surface modification , the superficial nickel plating 45 steel was carried on by laser surface alloying , the result indicated that the microstructure of surface with tiny crystal surpassed the substrate ' s obviously 摘要为提高45号钢的表面硬度,达到表面改性的目的,对表面镀镍的45号钢进行了激光表面合金化。
It produces even more of the glittery , shining tiny crystals than pyrites . the base color is generally pale bronze to greyish . because of it s base metal color and the shimmering of the crystals marcasite has been dubbed " black diamond " . its name is derived from a french word whose meaning is not clear 马克赛石亦为人工研磨,在925银制台座上起爪钉镶而成,做工极其精细,然后经染黑处理,使银饰不变色,并增添了“ marcasite ”的光泽,产生一种典雅的韵味。