vital
单词辨析：
语气较强，指对于某人或某事成功或继续存在是至关重要的。
It is vital to keep promises.
遵守诺言非常重要。
These measures have played a vital role in restoring the economy.
这些措施在恢复经济过程中起到了极为重要的作用。
指对将来发生的事而言十分重要的。
These talks are critical to the future of the country's overseas investment.
这些谈判对该国海外投资的前景至关重要。
It is absolutely critical for them to know the truth.
他们知道真相是至关重要的。
指作用十分重要或不能缺少的。
Who makes all the key decisions on foreign policy?
外交政策上所有重要的决定都是谁作出的？
Their research centred on the key factors of the solution to environmental pollution.
他们的研究集中于解决环境污染的关键因素上。
相关例句：
Agriculture is of vital importance to the nation's economy and the people's livelihood.
农业关系国计民生极大。
It was vital that the elections should be free of coercion or intimidation.
选举中不应有强迫或恐吓行为，这一点至关重要。
Governments do, however, have a vital catalytic role in orchestrating rescue operations.
然而，政府在组织协调救援行动上确实发挥了重要的促进作用。
Liaison between police forces and the art world is vital to combat art crime.
警方和艺术界的联手对于打击艺术品犯罪至关重要。
Now, can we move on and discuss the vital business of the day.
现在，我们接着往下讨论今天的重要事宜。
My nervousness made me deliver the vital points of my address without sufficient punch
我太紧张，没能有效地传达我演说的要点。