blue-sky

音标发音

The fig trees sway in the gentle Mediterranean breeze, cotton clouds scattered across the crystal blue-sky cast shadows over the plaza.
無花果樹在地中海的微風中輕輕搖邑，棉花般的雲朵散佈在水晶般湛藍的天空中，在廣場上撒下一地斑駁。
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.
但是來自美國的兩位研究員，一位是交通專家，另一位是大氣科學家，他們認爲把藍天思考納入世界諸多重大挑戰之一時候來到了。
Some of its work is truly "blue-sky" research.
他們的工作中有些是真正的“藍天研究”，即沒有直接實用價值的基礎科研。

David Bishop, who heads micromechanics research, plied such blue-sky pursuits as superconductivity a dozen years ago.
FORBES: Lucent's Labs
PARCs to perform blue-sky investigative work, how are the frontiers of scientific exploration going to be expanded?
ECONOMIST: A new blueprint needed
The company had pursued blue-sky basic research more common to drug titans with staffs three times as large.
FORBES: Biotech Behemoth

using the imagination to think of ideas that do not yet have practical uses or make money

of or denoting theoretical research without regard to any future application of its result
to theorize (about something that may not lead to any practical application)