论华北平原的黄河古水系 关键词： 华北平原；黄河；古水系[gap=962]Key words: North China Plain; the Yellow River; ancient river system
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River system in ancient village 徽州古村落水系
SYDNEY: An ancient river system buried 35 metres below the sand dunes Simpson Desert in Central Australia has been revealed by a team of Australian and American researchers.
悉尼：一个美国和澳大利亚的联合研究小组，在澳大利亚辛普森沙漠的沙丘下35米，发现了一条古老的河道网。
Since the Tertiary period, the ancient Song Huajiang-Liaohe drainage system has Undergone several large-scale alternations of lake and river.
第三纪以来，古松辽水系经历了几次大规模的河湖交替。
The key element controls the main massif to getting in touch with ancient city each other, river system and afforestation bring forward suggestion measure naturally.
自然要素控制主要对与古城相联系的山体、水系及绿化提出建议性措施。
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