含铜金属废料

SSS 2011-05-23

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Whether it's for streaming Netflix or sharing files, we're gobbling up more and more dataand we want it faster. But even shooting data with lasers over fiber-o

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Scientific American(五)月

Horizon - Life On Mars 火星生命 - 11

One of these wavelengths corresponds to hydrogen, another wavelength would be iron. Another wavelength would be oxygen. And so you go to the part of the spectrum you are interested in and you see you'

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火星生命

电信专业英英词典D-1

DAMA - Stands for Demand-Assigned Multiple Access. This is a way to instantaneously assign telephony channels in a transponder according to the immediate traffic demands. Dash - This is the the charac

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电信英语

电信专业英汉词典d1

digital revolution 数字革命 digit 数字 (码位 )，数位 digital economy 数字经济 digital earth 数字地球 digital subsistene 数字化生存 digital museum 数字博物

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电信英语

电信专业英英词典W, X, Y, Z

WAN wide area network WARC World Administrative Radio Consortium WATS Wide-area telecommunications services. See Wide-area telecommunications services. Waveform amplitude (magnitude) versus time repre

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电信英语

电信专业英英词典F-1

Fade - This is a reduction in the received signal. It is caused by absorption, refraction, or reflection. Fax - This is a shortening of Facsimile, and it refers to one fax machine sending a digital re

发表于:2019-01-03 / 阅读(48) / 评论(0)

电信英语

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