vigorous: further implies showing undepleted or undiminished capacity for activity or freshness or roubustness: still ~ and sharp in her seventieth year.     注意字母i发/i/


energetic: suggests a capacity for intense, sometimes bustling or forced, activity: an ~ wife, mother, and career woman.   bustle喧嚣忙乱嘈杂


strenuous: suggests what is arduous or challenging and evokes a consistently vigorous response: moved to Alaska in search of the ~ life.


lusty: implies exuberant energy and capacity for enjoyment: a huge meal to satisfy their ~ appetites.


nervous: suggests especially the forcibleness and sustained effectiveness resulting from mental vigor: a ~ energy informed his sculptures.


vigorous有活力: 强调不衰竭(的新鲜活力强健)，程度最强，energetic能量充沛: 即活动时有力量，strenuous奋力费力: 面对困难艰苦时的活力，lusty贪欲的: 指去享乐的能量，nervous思维有活力: 表示有思维活力，能长时间有力思考


记忆方法： 1）首字母LNVSE重组成VE维生素E(Vitamin E)，和NLS新活力力气(New Life Strength)<==增加活力

          2）活力的意思是有活力有力量mean having great vitality and force.