But two U. s. researchers, a transportation expert and an atmospheric scientist, decided the time had come to apply blue-sky thinking to one of the world's greatest challenges.

但是来自美国的两位研究员，一位是交通专家，另一位是大气科学家，他们认为把蓝天思考纳入世界诸多重大挑战之一时候来到了。

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Although some proposed features are inspired by blue-sky thinking, most have their roots in concrete use cases.

尽管一些建议的功能是由行不通的思路启发得到的，但大部分功能在具体的用例中拥有它们的根源。

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In contrast, tasks that require a little bit of creativity and abstract thinking benefit from high ceilings, lots of Windows and bright blue walls that match the sky.

相反，需要创意和抽象思考的任务适合在高天花板、多窗户、蓝色墙壁的房间中进行。

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With the bright blue sky and warm autumn sun, for a bizarre moment I remember thinking it looked more like a scene from a college brochure than the evacuation of a building under attack.

BBC: Remembering the Pentagon attack