adj.至关重要的；有活力的；生死攸关的
The government saw the introduction of new technology as vital. 政府认为引进新技术至关重要。
Confronted with such a vital problem of life and death, he looked as cool as a cucumber. 面对着这样重大的生死问题,他的神态却异常冷静。
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。
vital已含有most important的意思,故不再用于比较级和最高级。
