adj.关键的，重要的，重大的

Eric's colleagues all recognized that this was a momentous occasion.
埃里克的同事都认识到这是一个重要时刻。
Tom faces momentous and unpleasant choices.
汤姆面临着重要而且艰难的选择。
They also face a momentous choice.
他们面对着重大抉择。
The signing of the treaty was a momentous occasion in the history of both countries.
这个条约的签署对两国历史都是一个重大的时刻。
The discovery of penicillin was a momentous breakthrough in medicine.
青霉素的发现是医学上的一个重大突破。
The moon landing in 1969 was a momentous event that captivated the world's attention.
1969年的登月是吸引全世界关注的重大事件。
Her decision to quit her job and start her own business was a momentous step towards independence.
她决定辞职并开始自己的事业，这是她迈向独立的重要一步。
The fall of the Berlin Wall marked a momentous change in European history.
柏林墙的倒塌标志着欧洲历史上一个重大的变化。
The invention of the internet has had a momentous impact on how we communicate and access information.
互联网的发明对我们如何沟通和获取信息产生了巨大的影响。
The trial was momentous, as it set a legal precedent for similar cases in the future.
这次审判意义重大，因为它为未来的类似案件设立了法律先例。
The momentous announcement of the new policy took everyone by surprise.
新政策的这项重大宣布让所有人都感到惊讶。
The adoption of the Universal Declaration of Human Rights was a momentous achievement for humanity.
《世界人权宣言》的通过是人类的一项重大成就。
Winning the Nobel Prize was a momentous honor for the scientist, recognizing a lifetime of dedication to her field.
获得诺贝尔奖对这位科学家来说是一项崇高的荣誉，这是对她对该领域毕生奉献的认可。