目前，这两部不过是日本卡西欧公司的样机，它们能通过改变自身屏幕的光强来传传输数字信号。
These phones, as yet only prototypes from Casio, a Japanese firm, transmit digital signals by varying the intensity of the light given off from their screens.
目前，这两部不过是日本卡西欧公司的样机，它们能通过改变自身屏幕的光强来传传输数字信号。
These phones, as yet only prototypes from Casio, a Japanese firm, transmit digital signals by varying the intensity of the light given off from their screens.
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