touchstone

n.

试金石， （检验）标准；

复数：touchstones

1. Love is the touchstone of virtue.
   爱情是美德的试金石。
2. Adversity is man's true touchstone.
   逆境是人真正的试金石。
3. The greatest touchstone of any work is time.
   时间是检验一切的最好的试金石。
4. The touchstone of a contract is the notion of equality.
   检验契约的标准是平等的观念。

The Touchstone 30 Gigaflop DELTA Prototype
Serum albumin: touchstone or totem?
TOUCHSTONE: A unified approach to protein structure prediction
TOUCHSTONE II: a new approach to ab initio protein structure prediction
A Touchstone of Dissent: Euroskepticism in Contemporary West European Party Systems
A touchstone of dissent: Euroscepticism in contemporary Western European party systems
TOUCHSTONE: An ab initio Protein Structure Prediction Method That Uses Threading-Based Tertiary Restraints
Where wizards stay up late : the origins of the Internet /-1st Touchstone ed
National environmental policy plan 2. Summary. The environment: today's touchstone
Understanding the social organisation of maternity care systems: midwifery as a touchstone