energy、force、power、might、strength与vigour这些名词均有“力”之意。
energy : 用于人时，指工作时焕发出的精力或干劲。
- Since I started eating more healthily I've got so much more energy.
自从更加注意饮食健康以来，我精力愈发充沛了。 - I was going to go out this evening, but I just haven't got the energy.
今晚我本打算出去玩的，可是实在没有力气了。 - I didn't even have the energy to get out of bed.
我连下床的力气都没了。 - Her writing is full of passion and energy (= enthusiasm).
她的文章中充满激情和活力。
force : 着重指克服障碍，推动人或物朝所要求的方向运动或能产生明显效应的力量。
- The force of the wind had brought down a great many trees in the area.
强风刮倒了这一地区的许多树木。 - She slapped his face with unexpected force.
她扇了他一耳光，出乎意料地用力。 - Teachers aren't allowed to use force in the classroom.
老师管教学生时禁止使用体罚。 - The police were able to control the crowd by sheer force of numbers (= because there were more police than there were people in the crowd).
警方完全依靠人数上的优势才控制住了人群。
power : 最普通用词，泛指一切力量或能力等。
- Our car doesn't have enough power to tow a trailer.
我们的轿车功率不够大，拖不动拖车。 - Weightlifters have tremendous power in their arms and legs.
举重运动员的臂力和腿力极大。 - Scientists are working to harness the power of the atom.
科学家们正在研究如何利用原子能。 - The economic power of many Asian countries has grown dramatically in recent years.
近年来许多亚洲国家的经济实力有了显著的增长。
might : 多指巨大或超人的力量。
- Pizarro defeated the might of the Inca Empire with only a few hundred men.
皮萨罗依靠区区几百人打败了强大的印加帝国。 - She struggled with all her might to get free.
她用尽全力想挣脱出来。
strength : 指机体内部的能力，是依靠身体组织而存在的力，经使用就变为force。
- She had the strength and stamina to take the lead and win the gold medal.
她有领先并夺金的体力和耐力。 - Admitting you've made a mistake is a sign of strength, not weakness.
承认自己犯了错误显示出的是坚强，而不是软弱。 - He showed great strength of character when he refused to accept the bribes.
他拒绝接受贿赂，表现出崇高的人格。 - We will struggle on, drawing our strength from the courage of others.
我们应该从其他人的勇气中汲取力量，继续奋斗。 - Much of the country's military strength lies in its missile force.
这个国家的军事实力主要体现在导弹部队上。
vigour : 指由生命元气的存在所产生的活力、精力。
- They set about their work with youthful vigour and enthusiasm.
他们带着年轻人的活力与热情开始了工作。
