shì​jīn​shí

figurative test

试金石 (試金石) shì​jīn​shí
figurative test noun
a standard or criterion used to determine the quality, authenticity, or value of something
touchstone noun
a hard stone used to test the purity of gold or silver by the color of the streak produced on it

Frequency

Movie subtitles
0.060 per million appears in 0% of films
Written text
0.882 per million

Sources

Definitions
CC-CEDICT