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Sometimes it is hard to see the light, especially it lies in the invisible spectrum, like ultrared, ultraviolet radiation. But if you long to see the unseeable, you might interested to hear that under certain conditions people can catch a glimpse of
2015年Scientific American(一)月
A nightlight may keep those monsters under the bed. But it may also open the door to the blues. Because a new study reveals that animals exposed to light all night long show signs of clinical depression. If you have access to electricity, you no doub
Scientific American(十)月
By Brian Padden Salt Lake City, Utah 27 January 2006 watch Economic Legacy report As world attention shifts to the Olympic Winter Games in Turin, Italy, local organizers are hoping that the internatio
2006年VOA标准英语（一月）
DAVID GREENE, HOST: I mean, let's listen to this. (SOUNDBITE OF TV SHOW, STAR TREK: THE ORIGINAL SERIES) JAMES DOOHAN: (As Captain Montgomery Scott) Ready to transport. WILLIAM SHATNER: (As Captain James T. Kirk) Energize. D. GREENE: Yes, the familia
2017年NPR美国国家公共电台7月
But this still doesn't explain why light is able to pass through glass rather than being absorbed as with most solids. 但是这还是不能解释为什么光可以穿透玻璃而不是像其他大多固体那样被吸收。 For that, we need to go a
TED演讲教育篇
By Mil Arcega Washington, D.C. 08 June 2007 Oil producers in the Persian Gulf are breathing a sigh of relief as Cyclone Gonu weakened to a tropical storm. Shipping and port officials say the storm caused very little damage to major oil fields in the
2007年VOA标准英语（六月）