epoch-making

adj. /ˈepək meɪkɪŋ/ C2

划时代的；开辟新纪元的

Having great importance and bringing significant new developments.

仙境例句

The Dodo called the Caucus-race an epoch-making day, the start of a new age for wet birds.

渡渡鸟说团团转赛跑是划时代的一天，湿鸟们的新时代从此开始。