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It is easy to operate . The drivers usually contest speed on zigzag ring roads.
车手往往在曲折环行路线上竞速.
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Intersected by a number of ring roads, these streets thus form a clear eight-diagram pattern.
同时又有几条环形的街道和主路相交，就构成了一个非常鲜明的八卦图形。
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