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Around 30 percent of China's Ming-era Great Wall has disappeared over time as adverse natural conditions and reckless human activities -- including stealing the bricks to build houses -- erode the UNESCO World Heritage site, state media reported. 据官媒报道，中国的明长城大约有30%随着时间的推移已经消失，这是由于不利的自然条件和不计后果的人类活动（包括偷长城上的砖盖房子）侵蚀了这座由联合国教科文组织认定的世界文化遗产。 In places it is so dilapidated that estimates of its total length vary from 5,600 to 13,000 miles, depending on whether missing sections are included. Despite its length it is not, as is sometimes claimed, visible from space. 长城有些地方破旧不堪，所以对它长度的估算从5600英里到13000英里不等，这取决于是否把消失的部分涵盖在内。尽管长城很长，但不像有时人们说的那样从太空里能看见它。 Of that, 1,200 miles has melted away over the centuries, the Beijing Times reported. 《京华时报》报道称：“几个世纪以来，其中有1200英里已经消失了。” Some of the construction weathered away, while plants growing in the walls have accelerated the decay, said the report Sunday, citing a survey last year by the Great Wall of China Society. 周日的报道引用了中国长城学会去年的调查，说一部分长城风化掉了，还有的城墙里植物疯长加速了损毁。 | 
