Colors can be divided into two general categories: Cool (such as blue and green) and Warm (such as orange and red).

颜色分为两类：冷色调(比如蓝色、绿色)和暖色调(比如橙色、红色)。

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But there's evidence to suggest that chocolate is less fattening when eaten at the start of a dark, depressing day such as Blue Monday.

但有数据显示，在像“黑色星期一”这样沉闷的一天的天色刚开始暗的时候吃巧克比较不会发胖。

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Red aurora are generated by light emitted at a longer wavelength (0.630 micrometers), and other colors such as blue and purple are also sometimes observed.

红色的极光是由较长波长(0.630微米)的发出光引起的，有时也会观察到其他诸如蓝色和紫色的极光。

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He wrote some concert works, such as "Rhapsody in Blue,"

VOA: special.2009.02.08

In subsequent years the company acquired names brands that were well liked in their day such as Blue Bell, Healthtex and Bestform.

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Its rivals include firms such as Blue Heron Biotechnology, founded in 1999, and DNA 2.0, founded in 2003, both of which also deliver DNA on demand.

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Other important tools, such as the Blue Shield, have been developed by non-governmental organizations.

UNESCO: Lecture: Heritage and Conflict