Slovakian boys ride through the frozen Liptovska Mara dam as the sun sets near the central town of Liptovsky Mikulas, on March 22.

3月22日，当太阳落山时，斯洛伐克男孩骑车穿过靠近利普托夫斯基·米库拉什中心城市的冰冷的利普托夫斯卡·马拉水库大坝。

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Therefore, according to Beijing' s general planning, the arrangement of city - and - town system is to establish a system of four levels, namely, downtown, satellite town, central town and town.

为此，北京市总体规划确立的城镇体系布局，是建立市区、卫星城、中心镇和建制镇的四级城镇体系。

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Therefore, according to Beijing' s general planning, the arrangement of city - and - town system is to establish a system of four levels, namely, downtown, satellite town, central town and town.

为此，北京市总体规划确立的城镇体系布局，是建立市区、卫星城、中心镇和建制镇的四级城镇体系。

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