At each end of the fibre, optical signals must beconvertedto or from the electrical signals that computers use to process information.
在纤维的各端,必须将光信号转换成电信号或者将电信号转换成光信号,计算机用电信号处理信息。
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Newman believes one of the best studies on how cities built for cars might beconvertedto rail use is The Urban Village report, which used Melbourne as an example.