This cut topaz gemstone shows off its striking blue coloration, but the mineral also occurs in a colorless form or with a yellow or green color.

这颗经过切割的黄晶闪耀着夺目的蓝色光芒，但是这种宝石也有无色的，也有黄色或绿色的。

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For this reason, StarCraft forces you to have to decide when to cut workers to allow for more units and when to continue producing them for a mineral advantage later down the road.

正是这个原因，星际争霸就迫使玩家思考什么时候停止采矿单位的制造以制造更多的战斗单位，什么时候又继续开始采矿单位的生产以保证在以后的游戏中的经济优势。

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In the mineral table of hardness, it has a rating of 8, which means that a knife cannot cut it, and that topaz will scratch quartz.

在矿石硬度表上，它的硬度为8，这表明刀子不能割开它而它可在石英上划痕。

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Meantime, because universities have cut back on courses in earth sciences, mineral geology and mine engineering, there is a severe shortage of workers.

FORBES: A Career With A Big Future: Mining Engineer