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单词 pitchblende
释义 pitch·blende
\ˈpichˌblend\ noun
Etymology: part translation of German pechblende, from pech pitch + blende — more at blende
: a massive variety of uraninite occurring in metalliferous veins that ranges in color from brown to black and has a distinctive luster and that contains a slight amount of radium and is the principal ore-mineral source of uranium
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