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1世界最长的城墙———中国万里长城。2世界最古老的东西贸易通道———丝绸之路。3世界围地最大的城墙———明代南京石头城。4世界最高的北回归线标志塔———广东从化北回归标志塔。5世界水稻种植最北地区———黑龙江呼玛县。6世界最著名的涌潮———钱塘江潮。7世界最大陨
1 the world’s longest wall --- China Great Wall. 2 the world’s oldest trade channel --- the Silk Road. 3 the world’s largest wall around the city --- Nanjing Stone City in the Ming Dynasty. 4 Tropic of the Tropic of the World’s Tropic Towers --- Guangdong Conghua North returns to the sign of towers. 5 the world’s northernmost part of rice cultivation --- Huma County, Heilongjiang. 6 The world’s most famous tide - Qiantang River tide. 7 the world’s largest meteorite