unexpected situations，which forced us to develop new skills and strategies，” said Piccard.
英 语 ·D 选修7
Unit 20 New Frontiers
The spirit behind Solar Impulse is not just about the future of aviation，but the future of the planet.One reason why the plane was built was to promote clean energy and ing 11,628 solar cells (电池) across its wings，the plane collected sunlight during the day to fly itself through the night.
Solar Impulse completed the first ever solarpowered night flight above Switzerland in 2010.In 2011，it continued its success with the first international journey by a solarpowered plane，flying from Switzerland to Belgium to France.An intercontinental flight from Europe to Africa last year set a world record in distance for solar aviation (航行)，measuring 693 miles.
Borschberg and Piccard hope to continue to advance these innovations and clean technologies and complete a flight around the world in 2015.The pilots say they are optimistic that this dream is achievable.
词汇积累 1.accomplishment n．成就，成绩 2.strategy n．策略，计策 3.promote v．推广；促进 4.innovation n．创 新 5.achievable adj.实现的；达到目标的 6.stimulate v．激发
谢谢观看！
英 语 ·D 选修7
பைடு நூலகம்
Unit 20 New Frontiers
“The pioneering spirit is when we accept the question marks and the doubts ， and challenge the unknown ， ” said Piccard.“These questions and challenges are what stimulate human creativity.”
York.The 3,511mile trip lasted a total of 105 hours and 41 minutes.Though the plane landed safely in New York，it wasn’t
always a smooth ride. “During this journey，we had to find solutions for a lot of
英 语 ·D 选修7
Unit 20 New Frontiers
After these accomplishments ， Borschberg and Piccard
wanted to continue their adventure in the air.The journey across the US began on May 3,2013，in San Francisco，CA．Piccard and Borschberg took turns flying Solar Impulse.They landed at 11：09 pm on July 6 at John F．Kennedy International Airport in New
英 语 ·D 选修7
Unit 20 New Frontiers
Unit 20
New Frontiers
英 语 ·D 选修7
Unit 20 New Frontiers
你对太阳能了解多少？它对人类有何重要意义？
英 语 ·D 选修7
Unit 20 New Frontiers
On July 6 ， Swiss pilots Bertrand Piccard and André Borschberg made history when they completed a crosscountry journey in a plane powered only by solar energy.The plane，called Solar Impulse，flew across the United States without using a single drop of fuel.