very important or serious, especially because there may be important results synonym historic关键的;重要的;重大的 a momentous decision/event/occasion 重大决定/事件;重要时刻 At the same time, momentous events were taking place in Russia. 与此同时,俄罗斯正在发生重大事件。
Oxford Collocations DictionaryMomentous is used with these nouns:- change
- decision
- event
- …