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Virginia Tech researchers discover potentially harmful airborne nanoparticles produced through burning of coal（图）
Virginia Tech researchers potentially harmful airborne nanoparticles burning of coal
2017/9/4
Environmental scientists led by the Virginia Tech College of Science have discovered that the burning of coal produces incredibly small particles of a highly unusual form of titanium oxide.When inhale...
SOFIA Update: Airborne Telescope Tests Continue（图）
reflecting telescope Hubble Space Telescope
2007/2/6
January 04, 2007，NASA and the DLR (German Aerospace Center) are collaborating to create SOFIA, the Stratospheric Observatory for Infrared Astronomy—a Boeing 747-SP aircraft modified by L-3 Communicati...