翻译一段关于网络技术的英文(翻译标准了加分)
●Althoughagivenwaveformmaycontainfrequenciesoveraverybroadrange,asapracticalmatterany...
● Although a given waveform may contain frequencies over a very broad range, as a practical matter any transmission system will be able to accommodate only a limited band of (71) . This, in turn, limits the data rate that can be carried on the transmission (72) . A square wave has an infinite number of frequency components and hence an infinite (73) .However, the peak amplitude of the kth frequency component, kf, is only 1/k, so most of the (74) in this waveform is in the first few frequency components. In general, any digital waveform will have (75) bandwidth. If we attempt to transmit this waveform as a signal over any medium, the transmission system will limit the bandwidth that can be transmitted.(71)A.frequencies B.connections C.diagrams D.resources(72)A.procedures B.function C.route D.medium(73)A.source B.bandwidth C.energy D.cost(74)A.frequency B.energy C.amplitude D.phase(75)A.small B.limited C.infinite D.finite 答案:(71)A (72)D (73)B (74)B (75)C
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尽管一个给定波形可能覆盖很宽的频率范围,但是在实际问题中,任何传输系统都只能适应一个有限带宽的频率。这相应地限制了传输媒介能够采用的数据率。一个方波有无限多的谐波分量因而有无限大的带宽。然而,第k次谐波分量kf的幅度峰值只有1/k,所以该波形的大多数能量集中在靠前的几个少数频率分量上。通常,任何数字波形会有无限的带宽。如果我们尝试用任何媒介来传输这种波形信号,传输系统都会把信号带宽限制在媒介可传输的范围内。
(因为本人是相关专业的,所以有的地方并没有照字翻译,而是意译以便于理解,但意思没变.)
(因为本人是相关专业的,所以有的地方并没有照字翻译,而是意译以便于理解,但意思没变.)
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