一般情况下，您需要每个应用程序在某个特定位置有唯一配置。
Typically, you want each application to have a unique configuration in certain places.
纯金属是在元素周期表中占据特定位置的元素。
Pure metals are elements which come from a particular area of the periodic table.
纯金属是在元素周期表中占据特定位置的元素。
Pure metals are elements which come from a particular area of the periodic table.
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