有时，人们为了耕种而清理土地。

Sometimes, people clear land for farming.

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为了阻挡沙漠中的风沙，人们种了很多树。

People have planted a great many trees in order to hold back wind and sand in the desert.

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为了保持健康，建议人们应该定期锻炼。

It is recommended that one should keep regular exercise to stay healthy.

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And I write Animal Liberation to try to get people to think about that and not only think about that, but actually act differently.

我写的这本《动物解放》是为了,让人们思考这些现象,但不仅仅是思考，还要让人们做出实际行动。

普林斯顿公开课 - 人性课程节选

In fact, different people might make different choices about how much risk they're willing to bear to get a higher expected return.

事实上，为了获得高的预期收益率,人们愿意承受的风险,也会不同。

耶鲁公开课 - 金融市场课程节选

That was the whole reason for entering society in the first place, to protect the right to property.

这就是当初人们加入社会的初衷，为了保护财产权。

耶鲁公开课 - 公正课程节选