3.8M views 9 years ago. / @nsfscience This video uses animation, graphics, and video clips to illustrate and explain each of the "flow" and ... ... <看更多>
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3.8M views 9 years ago. / @nsfscience This video uses animation, graphics, and video clips to illustrate and explain each of the "flow" and ... ... <看更多>
Have you ever heard of the water cycle ? Maybe you've heard the word evaporation or precipitation. These are stages in the water cycle ! ... <看更多>