involving new and interesting ideas for things which are not yet possible or practical 新颖而未可行的;未能付诸实行的 The government has been doing some blue-sky thinking on how to improve school standards. 就如何提高学校的水平,政府仍然在作一些漫无边际的构想。 The laboratory tries to maintain a balance between applied research and blue-sky research. 实验室试图在应用研究和蓝天研究之间保持平衡。 A team of designers have been briefed to come up with blue-sky ideas to overhaul the company’s image. 一个设计师团队被告知要提出一些天蓝色的想法来彻底改变公司的形象。