3. 数学之美：参数化几何体与克莱因瓶
Higher wages and the way Dutch taxes bite in the middle of the income distribution make extra hours less attractive, encouraging families to trade income for time.
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通过在间隔像素上叠加一层微观遮罩结构，这些 OLED 像素的发光角度会大幅缩窄至正前方约 45° 的范围内，从而形成一片「窄角发光像素」：
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be integrated with a wide range of web applications，更多细节参见同城约会