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photophone n.【電訊】光線電話機;光音機。

photophore

Alexander graham bell develops the photophone which uses sunlight to carry messages . it was never commercially produced 亞歷山大.格雷厄姆.貝爾利用太陽光開發光電話用于傳輸信息。這種光電話從未用于商業生產。

It took a long time before the idea behind bell ' s photophone became practical 貝爾花了很多時間,才把光影電話的概念付諸實踐。

Bell considered the photophone one of his most important inventions 貝爾認為光影電話是他最重要的發明之一。

He called it the photophone 他把這項發明稱為光影電話。