The Department of Homeland Security raised its colour-coded threat warning to red, for certain flights, for the first time since its inception.

美国国土安全局将威胁警报设为红色，这是自设立以来的第一次。

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The colored road adhesive, developed by our company, is the special adhesive used in colour warning slip road construction technology.

彩色路面粘合剂是我公司自主研发的彩色警示防滑路面施工技术的专用粘合剂。

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Colour can also be used to convey specific meaning such as warning (red), caution (yellow), safety (green), etc.

颜色可能并且被使用表达具体意思譬如警告(红色)，小心(黄色)，安全(绿色)，等。

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