水是生命之源，也是农业生产和整个国民经济建设的命脉。

Water is the source of the life, and the lifeblood of agricultural production and the whole national economic construction too.

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坡度数据是农、林、水利等国民经济建设活动的基础数据。

Slope is the basic data for the agriculture, forestry, hydrologic research and other activities of national economy.

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反射地震学作为地震学应用于国民经济建设的分支学科取得了巨大的成功。

Reflection seismology as a branch of the seismology used in the national economic development has achieved great success.

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