单词：Schmitt optical system
单词：Schmitt optical system 相关文章
BARBARA KLEIN: Im Barbara Klein. STEVE EMBER: And Im Steve Ember with EXPLORATIONS in VOA Special English. This week on our program, we tell you about the new goals that President Obama is proposing for the space agency NASA. The plans include a deci
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Large Numbers of Starving California Sea Lion Pups Found on Beaches 海滩上发现大量饥饿的加州海狮幼崽 SAN DIEGO Since the beginning of the year, unusually large numbers of California sea lion pups have been found on the beaches of Sout
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Astronauts Criticize US Space Program Retired Astronaut Eugene Cernan is one of just twelve men who walked on the moon. He currently holds the distinction of being the last man there. It is tremendously disappointing that I am here 40 years later and
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Science and technology. 科技。 Climate change. 气候变化。 Good news at last? 终于来了好消息？ The climate may not be as sensitive to carbon dioxide as previously believed. 气候对二氧化碳的敏感性可能低于先前的预期。
经济学人科技系列
GWEN IFILL:Next, the correlation between motorcycle casualties and helmet laws. Judy Woodruff has the story. JUDY WOODRUFF:Fatalities on the nation's roads may be declining, but motorcycle deaths are not. Those deaths have increased from about 3,200
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AS IT IS 2015-06-04 Animals Dying in California Oil Spill 无数动物死于加州石油泄漏 Dead animals have been found along the coast of Central California almost every day for the past two weeks. On May 19, a pipeline broke, releasing thousand
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Breathe Carolina Re-Releases Hell is What You Make it In 2009, Breathe Carolina performed for the first time on the Vans Warped Tour, one of America's premier alternative rock festivals. As a sign of its success, the group has become headliners on th
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Climate change 气候变化 Good news at last? 终于来了好消息？ The climate may not be as sensitive to carbon dioxide as previously believed 气候对二氧化碳的敏感性可能低于先前的预期 CLIMATE science is famously complicated,
经济学人综合
JUDY WOODRUFF: For more on all of this and a look at some of the options before the military in the Bergdahl matter, we turn to New York Times reporter Eric Schmitt. And retired Lieutenant General Dana Chipman. He was the Army's judge advocate genera
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China's Tibet Autonomous Region is about to achieve a universal coverage of fibre-optical broadband service ahead of its schedule. As China further rolled out its universal broadband project, Tibet's broadband service is looking to reach 98% of admin
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