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　　Nature’s Gigantic Snow Plough　　On January 10, 1962, an enormous piece of glacier broke away and tumbled... [查看全文]

　　Three English dictionaries published recently all lay claim to possessing a ne w feature. The BBC English Dic... [查看全文]

　　There are some earth phenomena you can count on, but the magnetic field, someday is not of them. It fluctua... [查看全文]

　　Migration is usually defined as permanent or semipermanent change o f residence.　　 This broad definition, of... [查看全文]

　　About 5,000 years ago, the Egyptians and other people in the Near East began to use pictures as kind of wr... [查看全文]

　　Certainly no creature in the sea is odder than the common sea cucumber. All living creature， especially huma... [查看全文]

　　Tucked away in our subconscious is an idyllic vision. We see ourselves on a long trip that spans the contin... [查看全文]

　　Let children learn to judge their own work. A child learning to talk does not learn by being corrected all... [查看全文]

　　Computers monitor everything in Singapore from soil composition to location of manholes. At the airport, it to... [查看全文]

　　Racket, din clamor, noise, whatever you want to call it, unwanted sound is America’s most widespread nui... [查看全文]