touchstone, lydian stone

• 试金石

touchstone, lydian stone的用法和样例：

例句

1. The greatest touchstone of any work is time.
   时间是检验一切的最好的试金石。
2. She appeared to have in her experience a touchstone for everything.
   她的生活经历，似乎使她掌握了一切事物的试金石。