When melamine is present, the color of the solution changes from red to blue within seconds and can be measured both by visual inspection and spectrophotometry.

当存在三聚氰胺时，溶液的颜色将在几秒钟之内迅速从红色变为蓝色，而且能够同时通过肉眼观察和分光光度法检测到。

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Acids are chemicalcompounds that, in water solution, have a sharp taste, a corrosiveaction on metals, and the ability to turn certain blue vegetable dyesred.

酸是一种化合物，它在溶于水时具有强烈的气味和对金属的腐蚀性，并且能够使某些蓝色植物染料变红。

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Three workers at a uranium-processing plant in Tokaimura, then the center of the Japanese nuclear-power industry, improperly mixed a uranium solution. A blue flash heralded trouble.

当时的东海村是日本核能源工业的中心，而三名铀处理厂的工人铀混合操作不当，随之而来的蓝光预示着麻烦的来临。

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Mission Blue, however, is only one part of the solution.

CNN: An SOS on World Oceans Day: Save our seas, save ourselves

"These are problems without a solution, " he says with a grin, soaking up the sunshine in his blue serge suit.

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