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. 简要介绍了一组设计师的想法，提出了构想以重塑公司形象。