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单词 phosphorite
释义 phosphorite
 —phosphoritic /fos'feuh rit"ik/,  adj.  
 /fos"feuh ruyt'/,  n.  
 a sedimentary rock sufficiently rich in phosphate minerals to be used as a source of phosphorus for fertilizers.
 [1790-1800; PHOSPHOR- + -ITE1]
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