(1)活着的(having life;living;not dead)[无comp]：Is his grandmother still～? 他祖母还活着吗? Was the snake～or dead? 这条蛇是活的还是死的?keep the fish～养着那条鱼;No man～will believe you.没有一个活人会相信你。the greatest man～当今(在世的)最伟大的人;be buried～被活埋;〖同〗living;〖反〗dead，lifeless，departed;

(2)活跃的，有活力(生气)的(full of activity;active;lively)：He still looks very～at 70.他70岁了，仍然显得充满活力。Young people are always so～and exciting.年轻人总是那么生龙活虎，令人眼热。She is more～than the young lady.她比那年轻女士更活跃。All of his characters come～.他所塑造的人物都栩栩如生。The audience came～when she began to sing.她开始唱歌时观众活跃起来了。〖同〗active，lively，energetic，vital;〖反〗lifeless，spiritless，inactive;

(3)存在的，有效的，有生命力的(still in existence or operation)：keep hope/the argument/an awareness of the dangers/the party spirit～让希望不灭/辩论继续下去/对危险的意识不淡漠/党风发扬光大;Our plans to remodel the house are still～.我们改造房子的计划仍然没有放弃。The old customs are still～in the village.这村子里旧习俗依然盛行。

be alive to 充分意识(注意)到：be fully(well)～to the possible danger/the necessity/what is going on 充分意识到可能发生的危险/必要性/正在发生的事情;

be alive with 充满，到处是(指生物)：The sky was～with stars.天空布满繁星。The river was～with boats.河中到处是船。The dead dog was～with insects.那条死狗身上爬满了虫子。The town was～with policemen on the day of the match.比赛那天镇上到处是警察。The church hall is～with song.教堂里歌声洋溢。The room is～with colour.房间里色彩斑斓。

look alive 赶快：Look～! You'll miss the bus.快点!你要赶不上车了。