When autumn rolls around, the leaf peepers come out in force. Armed with digital cameras, they record the most spectacular displays of fall foliage. Well according to a study in the journal Functional Ecology [Toshie Mizunuma et al., The relationship

发表于:2018-12-02 / 阅读(42) / 评论(0) 分类 Scientific American(十二)月

Study Shows Climate Change Is Affecting Bird Migration 研究表明气候变化影响鸟类迁徙 Recently, a small group of birdwatchers spent three weeks around Mount Vernon, the home of the first president of the United States, George Washington.

发表于:2019-01-12 / 阅读(35) / 评论(0) 分类 2015年VOA慢速英语(一)月

By Margaret Besheer Baghdad 02 July 2007 The American military says it has evidence Iran is using the Lebanese Shiite militia group Hezbollah as a proxy to arm Shiite militants in Iraq. Officials also say Iran's elite Quds Force was aware of and help

发表于:2019-01-12 / 阅读(108) / 评论(0) 分类 2007年VOA标准英语(七月)

Negotiators at the climate summit in Copenhagen last month failed to agree on a new climate change treaty to replace the current Kyoto Protocol before it expires in 2012. Jonathan Lash is president of World Resources Institute, an environmental polic

发表于:2019-01-13 / 阅读(60) / 评论(0) 分类 VOA标准英语2010年(一月)

Climate Change Threatens World Food Production Higher temperatures and changing rainfall patterns resulting from global climate change will threaten food production in many parts of the world - especially regions in the tropics already struggling wit

发表于:2019-01-14 / 阅读(41) / 评论(0) 分类 VOA标准英语2011年(六月)

The long-running proxy wars between Chad and Sudan could be nearing an end following a rare meeting between the two nations' leaders in the Sudanese capital. The enmity between the two regimes has helped fuel the ongoing conflict in Darfur. Alan Bosw

发表于:2019-02-12 / 阅读(62) / 评论(0) 分类 VOA标准英语2010年(二月)