求下文的英译汉2不要机械翻译谢谢

With35watchtowersoverastretchofonly5½kilometers,theSimataisectionoftheGreatWallhasprobablythegreatestnumberofwatchtowersperkilometerthananyothersectionoftheGreatWall.SimataiGreatWallisdividedintotwosubsectionsthatlieoneithersideofalake,YuanyangHu("MandarinDuckLake"),whichisfedbytwosprings,onehotandtheothercold,withtheresultthatthelakeneverfreezesoverevenduringtheseverestofwinters.ThesubsectionoftheSimataisectionthatlieswestofMandarinDuckLakesnakesupagentlyroundedmountainridge.Herethereare20watchtowersspreadoutatvaryingdistances,inkeepingwiththedictatesoftheterrainandtheneedforsupplydepots/addedfortifications(whichistheroleplayedbythewatchtowers).

Totheeastofthelake,theterrainchangescharacterentirely,witharuggedmountainridgethatresemblesthe“razor”backofawildboar.Herethereare15watchtowers,mostofthemlocatedonsheerprecipices,andmostofthemsituatedatanaltitudeofabove1000metersabovesealevel.Theterraintotheeastofthelakedescendssharply,rightdowntothewater'sedge,withnoshorelinetospeakof.

SincebothsubsectionsoftheSimataisectionoftheGreatWalldescendfromeithersideintothedepressioninwhichMandarinDuckLakeisnestled,andsincethesnakingmountainridgesoneithersideofthelakearevisiblefromthefarendoftheoblonglake,themacroviewofthelandscape,accordingtothevividlyimaginativeChineseimagination,isoneoftwodragonsleapingoutofthelake,eachinoppositedirections.