epochal

形容词 epochal:

1. highly significant or important especially bringing about or marking the beginning of a new development or era
   同义词：epoch-making

1. Epochal decisions made by Roosevelt and Churchill.
   罗斯福和邱吉尔做出的有重大意义的决定

ep.och.al

adj.（形容词）
Of, relating to, or characteristic of an epoch.
开新纪元的：与新纪元或其特征有关的

Highly significant or important; momentous:
有重大或重要意义的；极其重要的：
例句：
epochal decisions made by Roosevelt and Churchill.
罗斯福和邱吉尔做出的有重大意义的决定

Without parallel:
无与伦比的：
例句：
epochal stupidity.
无与伦比的愚蠢