减洪减沙效益是其它效益的基础，经济效益是各种效益的目的。
Reducing of flood and sediment is the basis of other benefits and economical benefit is the aim of other benefits.
水土保持主要有减洪减沙效益、经济效益、社会效益和生态效益。
The benefits of soil and water conservation mainly include the economic, social and ecological benefits and the benefits of reducing flood and sediment.
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