单词:guide electric waves
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How does light get from the sun to the earth? How does music get from the stage to the audience? They move the same way in waves! Light and sound are forms of energy. All waves carry energy, but they may carry it differently. Light and sound travel t
Electric Fish 发电鱼 One way that Harold Zakon and his team find fish to study is to put electrical detectors into the bottom of murky streams in Venezuela. This works because certain fish emit pulses of electricity. Discover electric fish -- on tod
Idiom: Make waves ( make problems ) Hit the book: Tropical Endangered Algae Bleaching Ban
This is Day to Day, I am Alex Chadwick.It's time for our weekly book report.We all know you can not judge a book by its cover,but can you judge it by the lack of a subtitle? Book critic David Kipen thinks: Yes, maybe you can. Almost no publisher tak
VOA News March 11, 2011 - The first tsunami(海啸) waves have reached the U.S. West Coast after sweeping past the country's Pacific island state of Hawaii. There have been no immediate reports of casualties in the U.S. Waves of a meter or more hit t
The Monkees - I Wanna Be Free I wanna be free, Like the bluebirds flying by me Like the waves out on the blue sea. If your love has to tie me Dont try me, say good bye. I wanna be free, Dont say you love me Say you like me, But when I need you beside