It traces an arc, not a straight line, as income increases.

当收入增高时，收入和身高关系呈弧形，而不是直线。

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For many goods, an increase in income increases the demand for the good.

对于许多商品，收入的增加意味着对该商品的需求也增加。

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As income increases, its added contribution to life satisfaction becomes smaller.

因为，随着收入的增多，它对生活满意度的作用也逐渐减小。

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This company is looking to register its fourth quarter in a row of income increases.

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The tax code also includes an "AMT exemption, " which phases out as your income increases.

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But the poor going to work benefitted as well, with documented income increases of 25%.

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