单词：
单词： 相关文章
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
Scientific American(十二)月
Climate change may be partly to blame for the massive die-off of pine trees in the western U.S. But it works the other way, too: forest die-offs can alter the global climate. I like thinking of this as a parallel to something like El Nino. Abigail Sw
2016年Scientific American(十一)月
Severe Drought, Wildfires Threaten Water Resources This is Valles Caldera. Actually, it's the giant mouth of a dormant super volcano that last erupted 40,000 years ago. In the millennia since then, the terrain developed high-elevation forests, of abu
VOA标准英语2012年(一月)
A discovery of a mummified forest that's between two and 10 million years old is giving scientists a new window on climate change. Joel Barker, a research scientist at the Byrd Polar Research Center at the Ohio State University, discovered the mummif
VOA标准英语2010年(十二)月
Snow-whiteⅠ Once there was a Queen. She was sitting at the window. There was snow outside in the garden--snow on the hill and in the lane, snow on the huts and on the trees: all things were white with snow. She had some cloth in her hand and a need
趣味英语
But especially, in the winter, the extent to which this transportation and planting of nuts is carried on, is made apparent by the snow. 白雪皑皑的冬天，松鼠们忙碌搬运、种植松果的活动更为清晰可见。 In almost every wood y
美国语文第五册