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BNC: 20944 COCA: 17623

touchstone

Word family
touch·stone /ˈtʌtʃstəʊn $ -stoʊn/ noun [countableC]  
TYPICALsomething used as a test or standard 试金石;检验标准
touchstone of
 Pupil behaviour was seen as ‘the touchstone of quality’ of the school system.
学生的行为被看作是学校制度的质量试金石
Examples from the Corpus
Origin touchstone
(1500-1600) touchstone stone used for testing the quality of gold and silver ((16-21 centuries))
touch·stone noun
Chinese
Syllable
Corpus

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