超声波测云器

Study: Breaking Blood-Brain Barrier to Treat Brain Diseases

From VOA Learning English, this is the Health Lifestyle report. Our brains are protected by our skull. But that is not the only protection it has. A natural barrier around our brains prevents germs and other damaging substances in the blood from ente

发表于:2018-12-08 / 阅读(66) / 评论(0)

2018年VOA慢速英语(八)月

美国国家公共电台 NPR Nature's Ready For Her Close-Up: 'Planet Earth II' Returns In Ultra High-Def

STEVE INSKEEP, HOST: The BBC series Planet Earth was one of the first blockbuster high-definition TV shows a decade ago. Tomorrow, Planet Earth II debuts on BBC America. And this time, it is said to be in ultrahigh def. Reporter Will Huntsberry found

发表于:2019-01-16 / 阅读(25) / 评论(0)

2017年NPR美国国家公共电台2月

2017年CRI China's major ultra-high voltage transmission lines in smooth operation

China has long depended on coal-burning power plants to fuel its explosive growth over the past three decades. As a result, air pollution has risen to alarming levels in central and eastern regions. Policymakers have been working hard to shift the co

发表于:2019-01-19 / 阅读(102) / 评论(0)

2017CRI中国国际广播电台

VOA慢速英语20060320b

THIS IS AMERICA - With Podcasts, When Students Speak in Class, the World Can ListenBy Brianna Blake Broadcast: Monday, March 20, 2006 (MUSIC) VOICE ONE: Welcome to THIS IS AMERICA in VOA Special Engli

发表于:2019-01-30 / 阅读(60) / 评论(0)

2006年慢速英语（三）月

英闻天下——108 Competition for TV Market in CES 2013

This year, TV makers are doing their best to give huge-screen fanatics more breathing room. New ultrahigh-definition sets were shown off Monday by LG Electronics, Sharp, Sony and Samsung Electronics at the international CES gadget show in Las Vegas.

发表于:2019-02-14 / 阅读(162) / 评论(0)

英闻天下

经济学人265:传递热量良好的传导

Science and technology 科学技术 Channelling heat 传递热量 Good conduct 良好的传导 It may soon be possible to control heat flows with great precision 有可能实现对热流的精确控制 HEAT, as every schoolboy knows, moves in three w

发表于:2019-02-17 / 阅读(41) / 评论(0)

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