“amethyst”的概念、定义、翻译、参考文献-科学参考

单词	amethyst
释义	amethyst Chemistry The purple variety of the mineral quartz. It is found chiefly in Brazil, the Urals (Soviet Union), Arizona (USA), and Uruguay. The colour is due to impurities, especially iron oxide. It is used as a gemstone. Geology and Earth Sciences See quartz.
随便看	criticality analysis critical legal geography critical legal studies critical mass critical moisture content critical path critical path algorithm critical path analysis critical path method critical period critical point critical pressure critical properties critical race theory critical reaction critical realism critical reflection critical region critical resource critical section critical state critical temperature critical theory critical thermal maximum critical value

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