标桿反射器

Women's Pole Vault Provides Stirring Drama at Olympics

By Parke Brewer The women's pole vault provided one of the stirring dramas of the 2004 Olympic track and field competition. Until the mid 1990s, women's pole vault was not taken very seriously, mainly

发表于:2018-12-12 / 阅读(171) / 评论(0)

VOA2004（下）--雅典奥运

SSS 2010-04-27

In 1970, the Soviet Union put a laser reflector on the moon, carried by a rover. A few months later, it disappeared. Some speculated that the rover had fallen into a crater or parked in such a way as to render the reflector inaccessible. Now after 40

发表于:2018-12-24 / 阅读(201) / 评论(0)

Scientific American(四)月

60秒科学:美宇航局发现前苏联遗留在月球的激光

据《科学》杂志报道，苏联的月球车40年前在月球表面留下了激光反射器，虽然经过多年的搜寻科学家始终没有发现激光反射器的踪迹。 4月22日，一组物理学家终于发现了来自反射器的微弱闪

发表于:2019-01-02 / 阅读(216) / 评论(0)

60秒科学

电信专业英英词典G-1

Gain - This is an increase in signal power, due to a boost from an electronic device. Garbage - These are unwanted characters that appear because of either incorrect settings or noise. Gate - These ar

发表于:2019-01-03 / 阅读(192) / 评论(0)

电信英语

加州语文教材 G5 V5 North Pole, South Pole 11

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加州语文教材California Treasures G5

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发表于:2019-01-08 / 阅读(321) / 评论(0)

加州语文教材California Treasures G5

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加州语文教材California Treasures G5

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发表于:2019-01-08 / 阅读(302) / 评论(0)

加州语文教材California Treasures G5

2016年CRI World's largest radio telescope ＂can shed first light＂ in exploring universe: astronomers

The Five-hundred-meter wide Aperture Spherical Telescope, or FAST, is now operational in the mountains of Guizhou in southwest China. FAST has been designed to help Chinese researchers better understand our universe, as well as probe the cosmos for e

发表于:2019-01-19 / 阅读(215) / 评论(0)

2016CRI中国国际广播电台

英文短篇故事（纽约）193 Your Noise Right Back at You

Bart's upstairs neighbor was driving him nuts. He made all kinds of strange noises at all kinds of strange hours. If I tell my neighbor he's noisy, he won't believe me, Bart thought. He'll believe me only if he lives downstairs and hears himself upst

发表于:2019-01-22 / 阅读(180) / 评论(0)

英文短篇故事（纽约）

VOA常速英语2007年-Scientist in Texas Runs NASA's Lunar Laser Prog

By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti

发表于:2019-01-31 / 阅读(223) / 评论(0)

VOA常速英语2007年（十一月）

加州语文教材 G5 V5 North Pole, South Pole 01

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发表于:2019-02-09 / 阅读(311) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(258) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(290) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(328) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(317) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(287) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(326) / 评论(0)

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发表于:2019-02-09 / 阅读(303) / 评论(0)

加州语文教材California Treasures G5

2016年CRI World's largest radio telescope completes installation

The construction of the project was started in 2011 with an investment of 1.2-billion yuan, or about 180 million US dollars. The 500 metre Aperture Spherical Telescope, or FAST, is the size of 30 football fields. It's located in a hollow that was for

发表于:2019-02-21 / 阅读(264) / 评论(0)

2016CRI中国国际广播电台

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broad range regulator