高强度暴雨、低的森林覆盖率和严重的水土流失，是产生洪灾的直接和间接原因。

Great storm and small forest cover are direct and indirect reasons why flood occurs.

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进一步对客观执行不能现象进行了深入分析，查明了其产生的直接原因和间接原因，并阐述了其对执行程序产生的现实破坏。

Further analyzed this phenomenon, verified the immediate cause and the indirect reason which it produced, and elaborated its reality destruction which produced to the executive procedure.

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一个是直接原因：运动能使大脑产生一些化学物质从而调节情绪；另一个是间接原因：是由机体形象的改善和自我评价的提高而产生的。

One is the direct effect that exercise produces chemicals in the brain that affect mood, and the other is the indirect impact through enhanced body image and self-esteem.

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