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多国语言处理 data base important glasses of your sands
data base important glasses of your sands
书籍 Understanding+Optical+Communications
The use of light to send messages is not new. Fires were used for signaling in
biblical times, smoke signals have been used for thousands of years and flashing
lights have been used to communicate between warships at sea since the days of
Lord Nelson.
The idea of using glass fibre to carry an optica ...