摘要
Ashundredsofyearswentby,theimportantbeacontowersbuiltbypastdynastiesfelltoruin.Dependentfortheirupkeeponmilitaryneeds,theyallwereeventuallyabandonedduetopoliticalturbulenceorthedifficultyofmanningandupkeepinharshnaturalconditions.Beacontowerslosttheirfunctionandbecameoutwornrelics,usefulonlyforponderingthepast.
出版日期
2015年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
