单词：diagram on the plane of the celestial equator
单词：diagram on the plane of the celestial equator 相关文章
September Equinox 秋分 We have an equinox because an imaginary plane extending outward from Earth's equator isn't the same as the plane of Earth's orbit around the sun. Learn more about today's equinox -- on Earth and Sky.. JB: This is Earth and Sky
(科普英语)Earth and Sky
MARY TILLOTSON: This is Mary Tillotson. STEVE EMBER: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today, we tell about Amelia Earhart. She was one of Americas first female pilots. (MUSIC) MARY TILLOTSON: Amelia Earhart w
2010年VOA慢速英语(五)月
Solar-Powered Plane to Fly Around the World The makers and pilots of a solar-powered plane will try to fly it around the world beginning next month. The plane is called Solar Impulse 2, or SI-2. It arrived in pieces recently in Abu Dhabi in the Unite
2015年VOA慢速英语(二)月
VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today, we tell about Amelia Earhart. She was one of America's first female pilots. (MUSIC) VOICE ONE: Amelia Earhart was born in
VOA慢速英语2007年（七）月
Amelia Earhart wanted to fly around the world. Although other pilots had circled the globe, she would fly close to the equator. This would make a longer and harder trip29,000 miles. A special plane was neededa new Lockheed model called the Electra. T
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Jet streams, usually located about 30,000 to 35,000 feet up, can bowl along at up to 180 miles an hour and vastly influence weather systems over whole continents, yet their existence wasn't suspected until pilots began to fly into them during the Sec
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