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In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris and there is an increasing problem of satellites mysteriously breaking down. With first-hand accounts from astronauts and experts, Horizon reveals the scale of the problem of space junk. Our planet is surrounded by hundreds of millions of pieces of junk moving at 17,000 miles...。当杨六郎得知父亲杨业碰死李陵碑，七弟被潘仁美用计射杀后，一心要找潘仁美报仇。然而当他得知辽国的一石三鸟之计以及潘仁美的不臣之心后，放下私仇，用智谋保住了大宋的江山。。