A dichroic violet - blue to gray mineral silicate of magnesium , aluminum , and sometimes iron.
一种稀有的红灰色矿物, 由铜、铁 、 锗的硫化物组成.
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The combined pump light is received by the optical concentrator 108 through dichroic filter 106.
组合的泵浦光通过二向色滤光片106被光学集中器108接收.
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