Bell considered the photophone one of his most important inventions. 贝尔认为光影电话是他最重要的发明之一。
Bell's photophone was based on transmitting sound on a beam of light. 贝尔的光影电话是以光波来传递声音。
It took a long time before the idea behind Bell's photophone became practical. 贝尔花了很多时间，才把光影电话的概念付诸实践。
Alexander Graham Bell develops the photophone which uses sunlight to carry messages. It was never commercially produced. 亚历山大.;格雷厄姆
He's probably right, since the technology behind the photophone led to the technology that helps computers send information around the world today. 他可能是对的，因为后来的科技以他的发明为基础，进一步发展，让我们现在能够透过电脑来传送资讯。
Sunlight was then directed into the mirror, where the vibrations were captured and projected back to the photophone's receiver.There they were converted back into sound. 接著把阳光反射到镜子上，而这些震动就会被进一步投射到光影电话的接受器之上，并震动也再次被转换成为声音。
