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1、UNIT1In 1812, Napoleon Bonaparte, Emperor of the French, led his Grand Army into Russia.He was prepared for the fierce resistance of the Russian people defending their homeland. He was prepared for the long march across Russian soil to Moscow, the capital city
2、. But he was not prepared for the devastating enemy that met him in Moscow -- the raw, bitter, bleak Russian winter. In 1941, Adolf Hitler, leader of Nazi Germany, launched an attack against the Soviet Union, as Russia then was called. Hitler's military might
3、was unequaled. His war machine had mowed down resistance in most of Europe. Hitler expected a short campaign but, like Napoleon before him, was taught a painful lesson. The Russian winter again came to the aid of the Soviet soldiers. 1812年，法国皇帝拿破仑·波拿巴率大军入侵俄罗
4、斯。他准备好俄罗斯人民会为保卫祖国而奋勇抵抗。他准备好在俄罗斯广袤的国土上要经过长途跋涉才能进军首都莫斯科。但他没有料到在莫斯科他会遭遇劲敌—俄罗斯阴冷凄苦的寒冬。 1941年，纳粹德国元首阿道夫·希特勒进攻当时被称作苏联的俄罗斯。希特勒的军事实力堪称无敌。他的战争机器扫除了欧洲绝大部分地区的抵抗。希特勒希望速战速决，但是，就像在他之前的拿破仑一样，他得到的是痛苦的教训。仍是俄罗斯的冬天助了苏维埃士兵一臂之力。Unit2Twoofthemostfrustratingthingsaboutdrivingacara
5、regettinglostandgettingstuckintraffic.Whilethecomputerrevolutionisunlikelytocuretheseproblems,itwillhaveapositiveimpact.Sensorsinyourcartunedtoradiosignalsfromorbitingsatellitescanlocateyourcarpreciselyatanymomentandwarnoftrafficjams.Wealreadyhavetwenty-fourNa
6、vstarsatellitesorbitingtheearth,makingupwhatiscalledtheGlobalPositioningSystem.Theymakeitpossibletodetermineyourlocationontheearthtowithinaboutahundredfeet.Atanygiventime,thereareseveralGPSsatellitesorbitingoverheadatadistanceofabout11,000miles.Eachsatelliteco
7、ntainsfour"atomicclocks,"whichvibrateataprecisefrequency,accordingtothelawsofthequantumtheory.Asasatellitepassesoverhead,itsendsoutaradiosignalthatcanbedetectedbyareceiverinacar'scomputer.Thecar'scomputercanthencalculatehowfarthesatelliteisbymeasuringhowlongit
8、tookforthesignaltoarrive.Sincethespeedoflightiswellknown,anydelayinreceivingthesatellite'ssignalcanbeconvertedintoadistance.开车最头疼的两大麻烦是迷路和交通堵塞。虽然计算机革命不可能彻底解决这两个问题，但却会带来积极的影响。你汽车上与绕
