touch,触碰，触摸，引申词义检验，stone,石头。用于指试金石。

1. the touchstone for quality

检验质量的标准

2. A man's deed is the touchstone of his greatness or littleness.

行动是一个人伟大或者渺小的试金石.

3. 42 As the touchstone tries gold, so gold tries man.

42试金石试金, 黄金试人.

4. Job security has become the touchstone of a good job for many employees.

工作稳定性已成为很多员工衡量一份工作好坏的标准。

5. The touchstone of a contract is the notion of equality.

检验契约的标准是平等的观念.