touchstone
US /ˈtʌtʃ.stoʊn/
UK /ˈtʌtʃ.stoʊn/
名詞
1.
試金石
an established standard or principle by which something is judged:
例:
•
Until relatively recently, the Japanese car industry was the touchstone of international success.
Lingolandでこの単語を学ぶ
試金石
an established standard or principle by which something is judged: