历年真题：This adaptation is accomplished by improving efficiency of the heart and certain systems within the muscle cells.(2003年9月阅读)
译文：这一适应性的改变是在改善心率及肌肉细胞内的某些生理系统的效率后获得的。
efficient a.效率高的，有能力的
典型例句：Our efficient new machines are much cheaper to run.
译文：我们的这些效率很高的新机器用起来很省钱。
effort n.努力;努力的成果
典型例句：The directors' efforts to improve the comprehensive management in the company have been very effective.
译文：董事们为改讲公司的全面管理作出的努力是卓有成效的。
名师导学：该词属于常考词汇，考试题型以短语搭配为主：make an effort to do/at doing sth.(努力做某事)，spare no effort to do/at doing sth.(不遗余力做某事)。
想一想：effortless
Key:a.容易的，不费力气的
elaborate v.详述，详细制定 a.复杂的;精心制作的
典型例句：He frequently wandered from his text to elaborate on a point that had obviously caught his audience's interest.
译文：他常常偏离正题而去详细阐述那些能明显激发听众兴趣的话题。
名师导学：该词属于常考词汇，相关短语为elaborate on(对……做详细说明)，其中介词on是常见介词考点。
巧记：e(出)+labor(工作，劳动)+ate(动词后缀)=辛苦劳动做出来，精心制作
想一想：①elaborately ②elaboration
Key:①ad.苦心经营地，精巧地 ②n.苦心经营，苦心经营的结果，详尽的细节
elastic n.松紧带 a.有弹性的
典型例句：Language usage is too elastic to be described using just a few simple rules.
译文：语言的运用是相当灵活的，仅仅凭几条简单的规则是说明不了的。
