地下回归水量主要取决于当地的自然条件，如地形，土地情况，其中坡度对地下回归水的影响最大。

The amount underground of return flow depends mainly on local natural conditions, such as the topography, land situation, while the slope has great impact influence on it.

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美国人想象的情况是，投机者、自强不息者和跑步者总是在利用我们的土地提供的新机会。

Americans imagined a condition in which speculators, self-makers, runners are always using the new opportunities given by our land.

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如何在不增加动物数量、不影响脆弱的土地和我们的资源基础的情况下确保食物供应，这是一项挑战。

The challenge is how to ensure food without increasing animal numbers and having an impact on fragile lands and our resource bases.

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Well, I mean, just to defend Locke, he does say that there are some times in which you can't take another person's land.

要为洛克辩护的话，他的确说到了，几种情况下,你不能掠夺他人的土地。

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Soil was being eroded and wasted along the Eastern seaboard, and they were using up the great soils of the Mississippi Valley and over time that slave system just somehow wasn't going to work out.

东部沿海地区的土地因被侵蚀而荒废掉,密西西比河谷地区的土地资源即将被耗尽,但就在这种情况下,奴隶制依然能维持南方的经济

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