. They look at how birds fly and have manytests(试验). Their first plane flies only for several seconds. But on this day, the plane really flies in the sky. It flies for more than five minutes. ……

世界最大太阳能飞机Look at this plane! It gets power5 from the sun. Swiss engineers (瑞士的工程师) made it. It takes to the sky for the first time. It flies for 26 hours and nine minutes. ……

families are using solar power.Solar power converts the sun’s rays into energy. One hour of the sun....The study involved fruit flies, as they share many genes (基因) with humans. Researchers gave one group ……

rays (紫外线) come in. The sun sends ultraviolet rays to Earth, so the rays can be used... the plane’s engine running at low power, it’s producing air pollution. Engines can give out millions ……

Priestess (女祭司), lit the Olympic Flame directly from the sun rays. An eight-day torch relay around Greece will follow. The flame flies to Britain on May 18 for a 70-day relay around the UK ……

火箭人飞越英吉利海峡。
CAN a man fly like a plane? Yves Rossy can. He is a Swiss pilot (瑞士飞行员). He is 49 years old. On September 26, he flies across the English Channel (英吉利海峡) from France. He flies 35 kilometers ……

reflect (反射) the light back towards space or absorb (吸收) the light.If the rays of the sun's light... are white.Sometimes the angle of the sun's rays can cause a different scattering of light. This makes ……

LONDON - Firefighters last week blamed a goldfish bowl for sending 26 people to the hospital in Britain.They believe the bowl may have acted as a magnifying glass by concentrating the sun's rays ……

可以遥控的纸飞机Do you like to fly paper planes? Now there is a pretty cool one. You can control (控制) it with a phone or iPad. It flies fast and high. Let’s have a paper plane race (比赛) with our friends! ……

.Rays (光线) of the sun produce heat energy, called solar power. An hour’s worth of sunlight on Earth.... Without a drop of oil, it is powered only by sunlight. Early this March, this plane will begin its ……

call it solar power. Solar power is the power of the sun’s rays (光线) on the Earth. People can change...你知道太阳能在生活中的用途吗？课件及教案见网站SOLAR Impulse (阳光动力号) is a solar-powered (太阳能的) plane. It finished its first ……

a match to light the torch. They use a special mirror and the sun’s rays (光线). What..., first to Athens (雅典), and then to Beijing by plane. It’s called the torch relay (火炬传递). How ……

Felix flies further than ever before飞翔于海上，横穿英吉利海峡——他实现了自己的梦想It's a bird! It's a plane... jumped out of a plane 30,000 feet (9,144 metres) above England. He then flew 21 miles (34 km) across ……

WE'VE all heard that to protect our skin from the sun's aging effects and cancer-causing rays, we should stay out of the sun. The next best thing, of course, is to apply sunscreen or wear protective ……

and Bertrand Piccard, are trying to answer the question – by flying a solar-powered plane. Having.... The plane, called Solar Impulse-2, has a 72-meter wingspan (翼展) and weighs about 2,300 kilograms ……