Unit1?李颖：Wearegoingtoascendthegreatwalltomorrowmorning.SoI’dliketogotobedearlyandhaveagoodsleepthisevening.Youknowclimbingthegreatwallisnotaneasyjob.?明天早上我们计划去爬长城，所以我想今晚早点休息，好好睡一觉。你知道爬长城可不是一件简单的事情。?Jack:Great.TheGreatWallisveryfamousandbecomesamustfortouristinBeijing.Wouldyoutellmesomethingaboutit??好啊。长城那么有名，是游客来北京必去的景点。你能和我说一说长城么？?李颖：OK.Theconstructionofthegreatwalltookaltogetherover2000years.itstartedintheZhoudynastyinthe7thcentury.B.C.AndcontinueduntilMingDynastyinthe15thcenturyA.D.TheexistingwallwasbuiltintheMingDynasty.?好。长城的整个建筑过程持续了总共两千多年，始于公元七世纪的周朝，后来一直延续到公元后十五世纪的明朝。现存的城墙都是明朝修建的。?Jack:TheGreatWallisindeedthecrystallizationoftheindustryandwisdomoftheChinesepeopleandalsoasymbolofancientChineseculture.Thenwhytheancientpeoplebuiltthewall??长城的确是中国人民勤劳智慧的结晶，同时也是中国古代文化的象征.那么为什么古代人民要修建长城呢？?李颖：Itwasconstructedtoguardagainsttheinvasionbynomadictribesfromthenorth.Whenenemytroopsapproached,guardsonwatchwouldsendsmokesignalsfromthebeacon-firetowersasanalarm.?修建长城是为了抵御来自北方游牧民族的入侵。敌军逼近时，放哨的警卫就会在烽火台上发送烟雾信号作为警报。?Jack:Howdidtheymanagetodoso?Canyoubemorespecific??他们怎么发送烟雾信号作为警报呢？你能说的具体点么？?李颖：Thosetowersonthewallarespacedatequaldistancesfromeachother.Whenguardsinatowersawthesignalsfromitsneighbor,theyimmediatelydidthesamething.Inthisway;thesignalswouldberelayedtothecapital.?长城上的烽火台是均匀分布的。如果烽火台上的警卫看到相邻烽火台上发出的信号，他们就会立刻跟着发出信号。这样一个接一个信号就传到了都城。?Jack:whatthesmartideatheancientpeoplehad!Iwastoldthatinchina.PeopleusuallycalltheGreatWall“TenThousandLiLongWall”.Doesitreallymeanthatlong??古代人民的想法真是巧妙啊！我听说在中国人们通常把长城称作“万里长城”。真的有那么长么？?李颖：Yes,exactly.Itrunsallthewayacrosstheeasternhalfofchinawithalengthofabout6000kilometers.是的，正是这样。长城绵延约6000公里，穿越了中国的东半部。?Jack:6000kilometers!Itisunbelievable.6000公里！难以置信。?李颖：TheGreatWallissaidtobetheonlybuildingontheearththatcanbeseenfromtheouterspace.据说万里长城是从外太空可以看到的地球上唯一的建筑。?Jack:Ibelieveso.IoncelearnedthatTheGreatWallinchinahasbeenrankedoneoftheEightGreatWondersintheworld.这个我相信。我以前听说中国的万里长城已经被列入世界八大奇迹了。李颖：噢，我看你对长城很了解嘛。LiYing:Oh,itseemstomethatyoualreadyknowalotabouttheGreatWall.Jack:Totellyouthetruth,IaminterestedinChinesecultureandspecializeinthestudyofthehistoryofChina.Ievenknowthestoryof“MengjiangnuWeepingontheGreatWall”.杰克：老实说，我对中国文化很感兴趣，专修中国历史。我还知道孟姜女哭长城的故事呢。?李颖：真的？这是个悲惨的故事，发生在秦始皇统治时期，秦始皇也就是秦朝的第一个皇帝。?LiYing:Really?That’satragicstory.IttookplaceinthereignofEmperorQinshihuang,theFirstEmperoroftheQinDynasty.?Jack:Yes.Mengjiangnuwasaverygoodwife.Onewinter,shecametotheGreatWallwithwarmclothesforherhusband,butherhusbandhadalreadydied.ShewasheartbrokenandweptsobitterlythattheGreatWallcollapsed.?杰克：是的。孟姜女是位很好的妻子。她在寒冬里到长城给丈夫送棉衣，但是丈夫却已经过世了。她伤心欲绝，悲泣不止，结果把长城都哭倒了。?李颖：正是这样。孟姜女看到丈夫的尸体在城墙下时，带着万分悲痛投海自尽。真...
