The most appropriate geographical unit for water resources planning is usually the river drainage basin.

对水资源的规划而言，最妥协的地理单位通常是河流的排水盆地。

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The most appropriate geographical unit for water resources planning is usually the river drainage basin.

对水资源的规划而言，最妥协的地理单位通常是河流的排水盆地。

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