Tilting at windmills: the boy who harnessed the wind
Malawian teenager William Kamkwamba built a generator out of a bicycle and tractor fan. Now he's lauded by environmentalists. more
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2 comments:
如果你批評他人。你就沒有時間付出愛.........................
過去的事早已消失，未來的事更渺不可知，只有現在是真實的 ..................................................
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