A large number of pump stations undertake the tasks of agriculture pumping irrigation, urban water supply and drainage and play the important role in the national economy of China.

我国目前大量的泵站在国民经济中承担着农业抽水灌溉、城市供水排水等任务，发挥着巨大的作用。

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Guanzhong area has long history in China and its urban economy was very flourish , which was closely related to its positive transportion condition .

陇海铁路关中沿线地区是我国历史开发特别悠久、城镇经济曾经很繁荣的地区，这与其当时便利的交通条件有密切关系。

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There are obvious differences between urban and rural areas in China in this respect because of the influences of society, economy, culture and so on.

在庞大的中国老年人群中，由于社会、经济、文化等因素的影响，我国城乡老年人口状况存在着较大的差异。

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