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亞歷山大‧葛拉罕‧比爾 (Alexander
Graham Bill) 在1880年6月3日發明了光影電話 (photophone)
想像一個用太陽能發電的電話，你應該就比較能夠瞭解亞歷山大‧葛拉罕‧貝爾在他發明電話的四年後，於1880年6月3日發明的這個小玩意兒。貝爾認為光影電話是他最重要的發明之一。他可能是對的，因為後來的科技以他的發明為基礎，進一步發展，讓我們現在能夠透過電腦來傳送資訊。
Imagine a solar-powered telephone, and you're close to understanding the important gadget Alexander Graham Bell invented on June 3, 1880, four years after he had patented the telephone. Bell considered the photophone one of his most important inventions. He's probably right, since the technology behind the photophone led to the technology that helps computers send information around the world today.
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