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touch·stone AHD[tŭchʹstōn'] D.J.[ˈtʌtʃˌstəʊn]K.K.[ˈtʌtʃˌston]n.（名词）- A hard black stone, such as jasper or basalt, formerly used to test the quality of gold or silver by comparing the streak left on the stone by one of these metals with that of a standard alloy.试金石：一种如碧玉或玄武岩的坚硬黑色石头，先前用来检验金或银的质量，用这些金属在石头上留下的划痕与标准纯度进行比较
- An excellent quality or example that is used to test the excellence or genuineness of others:检验标准；检验手段：用来检测其他事物的优秀或真实程度的优秀品质或样品："the qualities of courage and vision that are the touchstones of leadership"(Henry A. Kissinger)See Synonyms at standard “勇气与远见是检验领导风范的试金石”(亨利A.基辛格) 参见 standard
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