(1)充满活动的(lively and energetic)：a～person/personality/leader 一个充满活力的人/个性/领导;a～sort of person 一个精力旺盛的人;one of the most～people 最有活力的人之一;The director's～and cheerful manner filled his members with courage. 指导者生机勃勃、令人振奋的举止使其成员充满勇气。～and attractive 充满活力，光彩迷人;〖同〗lively，energetic，vigorous，spirited;〖反〗listless，uninvolved;

(2)维持生命必需的，有关生命的(necessary to or concerned with the maintenance of life)[无comp][作attrib]：～force/processes/organs 生命力/维持生命的过程/生命必需的器官;be wounded in a～part of one's anatomy 身体的重要器官受伤;(lungs) perform a～bodily function(肺部)起着维持生命的功能;The patient's pulse and other～signs are weakening . 病人的脉搏及其他生命迹象正在减弱。The dead girl's body had lost all its～heat. 女孩的尸体已没有了体温。the～spark 使音乐充满生气或剧本角色栩栩如生的力量;～statistics 生命统计;人口动态统计;女子胸围、腰围、臀围的尺寸;〖同〗living，alive，live;〖反〗dying，dead;

(3)至关重要(必不可少)的(of critical importance)[A (to/for)]：～information/research/legislation/decisions/clues (to the killer's identity) 至关重要的信息/研究/法规/决定/(关于凶手身份的)线索;Speed/Secrecy/Co-operation is～to the success of the scheme. 速度/保密/合作是该计划获取成功所必不可少的。It is～to his health that he take this medicine. 服这种药对他的健康至关重要。Air is～for all animals. 空气对所有动物都是必不可少的。be of～importance是至关重要的;〖同〗important，significant，critical;serious，essential，necessary;〖反〗unimportant，insignificant，nonessential，unnecessary;

(4)致命的(deadly)：A～wound is one that will cause death. 致命伤就是会导致死亡的伤。

→′vitally adv 极端地;vi′tality n 生命力;′vitalize，-ise v 给予……生命;

【注意】vital为形容词;vitals为名词，意为“维持生命的重要器官;要害”。