touchstone
US /ˈtʌtʃ.stoʊn/
UK /ˈtʌtʃ.stoʊn/
名词
1.
试金石
an established standard or principle by which something is judged:
示例:
•
Until relatively recently, the Japanese car industry was the touchstone of international success.
在 Lingoland 学习这个单词
试金石
an established standard or principle by which something is judged: