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
touchstone• I have believed that since my earliest days, and I have used it as a touchstone in all my leadership endeavors.• It is a touchstone for legaldefinitions and rulings.• At its core would be using inflation-adjusted interest rates on short-termcredit as its touchstone in setting policy.• We had to rethink the issues and create new touchstones...• I knew one little poem by her, when I was very small, and it became a kind of touchstone.• Tested against the touchstone of Scripture, his speculations would reduce the Bible to the size of a slimpaperback.• They tend to regardgrammar as the touchstone of all language performance.• The touchstone of the relationship is commercial.