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Acid Rain 酸雨 Damage from acid rain is widespread - not just in eastern North America, but throughout Europe, Japan, China, and Southeast Asia. Is the rain that's falling on your umbrella acidic? A listener's question -- on today's Earth and Sky. J
(科普英语)Earth and Sky
How does acid deposition affect human health? We eat food, drink water, and breathe air that has come in contact with acid deposition. Canadian and U.S. studies indicate that there is a link between t
知性英语
One day a fox fell into a well and could not scramble out again．The water was not very deep，but the sides of the well were smoothand were covered with slippery moss so that every time the fox struggled up a few inches，he slipped down again with
趣味英语
One day a fox fell into a well, he could not scramble out again. The water was ont very deep, but the size of the well was move and recovered with slippery mass. So that every time the fox struggle up a few inches he slipped down again with the spla
白领英语晨读
By Birungi Machrine Kampala 26 November 2007 Attacks using acid are becoming more frequent in Uganda. Up to 2003, there were only 145 recorded attacks, but over the last three years, there have already been 87. Survivors often suffer from severe emot
VOA常速英语2007年（十一月）
The Goat-Calf Once a Leopard and a Jackal came to a village. The Leopard caught a goat, and the Jackal caught a cow. They brought the goat and the cow back. The Leopard put the goat in his field, and the Jackal put the cow in his field. The Leopard w
趣味英语