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crucial、vital、important的区别为：指代不同、用法不同、侧重点不同
一、指代不同
1、crucial：至关重要的。
2、vital：对…极重要的。
3、important：重要的。
二、用法不同
1、crucial：crucial的意思是“决定性的，关键性的，至关重要的”，多用于指那些令人恐惧或担忧的危机局势，暗示决定性或终结性的后果会随之而来。
2、vital：vital侧重事物的关系，多含有中性或积极的意味。vital后接的that从句通常用虚拟语气。
3、important：important形容事物时表示“重大，重要，紧急”，形容人时表示“有权力〔地位〕”“自以为了不起”，在句中一般用作定语、表语。
三、侧重点不同
1、crucial：表示“决定性的”，常是在两个决定或假想中最终决定为关键的。
2、vital：正式用词，侧重指维持生命、活力必不可少的，或生死攸关的。
3、important：最普通用词，指有权威、有影响的人或值得注意的、有价值的事物。
胃食眉眉
生死攸关
vital
adj. 至关重要的; 维持生命所必需的; 生死攸关的; 生气勃勃的;
[例句]The port is vital to supply relief to millions of drought victims
这个港口对向数百万旱灾灾民提供救援物资是至关重要的。
[其他] 比较级：more vital 最高级：most vital
8888一美食家
英 [ˈvaɪtl]美 ['vaɪtl]
比较级：more vital最高级：most vital
基本解释
形容词 至关重要的; 维持生命所必需的; 生死攸关的; 生气勃勃的
例句
形容词
1. The Chinese I knew were trusting, open, and vital.
我所认识的中国人信赖别人，坦率，充满活力。
2. He committed a vital error.
他犯了一个致命的错误。
3. Growth and decay are vital processes.
生长和衰亡是生命过程。
4. The questions put forward at the meeting are of vital importance.
会上提出的那些问题极其重要。
1. US policymakers and politicians should not buy into such protectionism that would cost both countries a vital growth engine in the years ahead.
2. It plays a vital role in accessing remote locations and in cases where insecurity prevents travel by road.
3. NASA managers said fixing the cable reel was vital to space station construction, which will take 15 more shuttle flights.
4. Organizers said the campaign is part of the country's human resources development strategy, and is vital for upgrading China's competitiveness and national strength.
5. Most of the students who board at the school are from poor rural families, and the school canteen plays a vital role to provide nutrition to them.
6. Swift recovery is vital to support the economic policies of the White House and retain Obama's political capital.
7. Forests help to balance the global production and storage of carbon dioxide, thereby playing a vital role in regulating climate change.
8. I hope China will categorically outline her stance on vital international issues.
9. Proteins in turn serve as building blocks and workhorses of the cell, vital to its structure and functions.
10. Establishing Tianjin as Northern China's economic center is strategically vital for reduction of the economic gap between China's North and South.
1. Dan Clarion, the maintenance manager and harbor master in Ouzinkie, a town of about 170 people on an island off Alaska, said the new airport was vital for safety reasons.
镇的维护经理和港湾负责人，这个镇在阿拉斯加旁一个小岛上，有170人。他说修建新机场出于安全考虑是十分重要的`。
2. He never held forth; his ideas were really not vital enough for it, he was too confused and emotional.
他一向是不当众演说的，他的思想实在缺少力量，他太摸不清头脑而且太易感动了。
3. Trypan-blue and alizarin red vital staining refer to lens epithelial cells, which was a practical methord to observe the morphology, density, area and the cellula vis vitalis.
台盼蓝-茜素红活性染色可用于观察晶状体上皮细胞的形态、密度、面积以及细胞的活力，是研究晶状体上皮细胞的一种良好而实用的方法。
4. So it is vital to determine the leakage pressure to prevent leakage.
塔中I号坡折带奥陶系碳酸盐岩段在钻井施工时常遇到不同程度的井漏，确定漏失层段的漏失压力是防漏堵漏的依据。
5. We all know that libraries play a vital role in the education and entertainment of the general reader.
我们都知道图书馆在对大众的教育和娱乐方面起了很重要的作用。
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