单词：unstable limit cycle
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Water Cycle 水循环 All the oceans on earth are salty, while inland water is typically fresh. How does water become salty? We'll answer a listener's question -- today on Earth and Sky. DB: This is Earth and Sky. We recently visited the Austin Childr
(科普英语)Earth and Sky
Fire Cycle 火灾规律 The El Nino phenomenon of 1997-98 unleashed torrential rain in some parts of the world, while creating abnormally dry conditions in others. And it sparked record numbers of wildfires. Learn more about climate and wildfire -- toda
(科普英语)Earth and Sky
The government said that work on the first seven cycle tracks which were promised earlier this year will start in the summer. This will cost $9 million. Another $41 million will be spent later. Together these cycle tracks will be called The Great Rid
新西兰英语
By David Gollust State Department 22 February 2008 The United States Friday called on Turkey to limit the scope of its ground incursion in northern Iraq and bring it to an early conclusion. The operation is apparently the biggest of several recent Tu
VOA常速英语2008年（二月）
今天我们要学的词是age limit。 Age limit, 年龄限制。社交网站脸书网并不是任何人都能注册帐户的。 Facebook enforces an age limit of 13 years or older to register an account, 脸谱网规定，只有满13岁的人才能注
英语单词荟萃
Classical music fans in Beijing are now embracing a massive work-the complete cycle of Beethoven's 9 symphonies with The Deutsche Kammerphilharmonie Bremen. Paavo Jarvi, an internationally famous Estonian conductor, is the artistic director of the or
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