31.In the 1980s, scientists established the revolutionary concept that nicotine is extremely addictive.

　　在20世纪80年代，科学家们建立了一种革命性的观念，即尼古丁具有极强的致瘾性。

　　32.Yet e-mail---and all online communication—is in fact something truly different.

　　然而电子邮件，以及所有在线交流，实际上是一种全新的东西。

　　33.Well-being, not just wealth, should mark the progress of our societies.

　　人们身心的健康与快乐，并非财富，才是我们社会进步的标志。

　　34.Passing students who have not mastered the work cheats them and the employers who expect graduates to have basic skills.

　　让没有掌握本领的学生通过考核，即欺骗了期望毕业生拥有基本技能的雇主

　　35.Meanwhile, my two sisters and I, who lived in three different cities, were united once again in a hospital waiting room.

　　与此同时，我和两个妹妹原本都生活在三个不同的城市，这时却在医院的等候室里再次相聚了。

　　36.Each executive raised his right hand and solemnly swore to tell the whole truth about his business.

　　每位总裁举起右手，郑重宣誓要对从事的业务实话实说。

　　37.Perhaps each individual contribution is small, but the scale of the internet multiplies all efforts dramatically.

　　个人的力量也许很渺小，但是因特网的规模使得众人的力量无限放大。

　　38.It seems that the Enlightenment brought forth unparalleled liberty in economic, social and political life, but we are now undergoing a midlife crisis.

　　启蒙运动带给我们无可比拟的经济、社会以及政治生活的自由，而我们现在正经受着“中年”危机。