由于在传输过程中采用高压直流电缆输送的损耗要比传统交流电的损耗小得多，因此采用交流电远距离传送电力很不划算。
Energy losses on DC lines are far lower than on the traditional AC ones, which make transmission of energy over long distances uneconomic.
众所周知，除了光纤损耗，定时抖动是限制孤子系统传输距离的关键因素。
It is well known that, apart from fiber loss, timing jitter is the key factor which limits the total transmission distance of the soliton system.
由于光放大器和各种色散补偿技术的采用，光纤损耗和色散对系统的传输距离不再起主要限制作用。
Fiber loss and dispersion have been overcome greatly because of the development of optical amplifiers and chromatic dispersion compensation technology.
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