选择交流电作为工业标准的原因很简单，在早期供电距离很短的电网里，交流电的损耗比直流电小。
The reason was that over the short distances spanned by early power grids, AC transmission suffers lower losses than DC. It thus became the industry standard.
目前，40%左右的消费者可选择供电公司，而这在2002年是很罕见的。
Now, around 40 percent of consumers can choose their supplier – something that was scarcely available in 2002.
目前，40%左右的消费者可选择供电公司，而这在2002年是很罕见的。
Now, around 40 percent of consumers can choose their supplier — something that was scarcely available in 2002.
通信组网主要涉及系统供电、线缆选择、线路拓扑和接地等。
Communication network is concerned on system power supply, wire select, network top and earthing.
然而，如果客户选择提供电子邮件信息，那么这个模式支持文档最多包含5个电子邮件地址(也就是说，5个电子邮件元素值)。
However, if a customer chooses to give you email information, this schema enables conforming documents to contain up to five email addresses (that is, five email element values).
该装置由三节AAA电池供电，可以保持腋下五到九小时的干爽，持续时间长短取决于你对三种风力大小的选择。
The device is powered by three AAA batteries and can keep your armpits nice and dry for five to nine hours, depending on which of the three speeds you use.
变电所供电半径的选择是一个复杂的问题。
The choice of power supply radius for transformer substations is a complicated problem.
因此，UPS电池的选择不仅关系到经济成本问题，还直接影响UPS电源的不间断供电。
The selection of battery not only involves with the issue of cost, but also directly influences the uninterrupting powering of UPS system.
本文针对通信电源维护中的几个热点问题进行了探讨，包括新的供电方式、集中监控、设备的维护以及新设备的选择等。
This paper discusses some hot problems of the maintenance and administration for communication power, including separate powering, centralization monitor, selecting main equipment, and so on.
文章讨论激光二极管供电和控制检测仪器的选择、操作和使用。
The selection, handling and use of laser-diode power supplies and control instrumentation are discussed in this article.
简要介绍企业供电系统的低压短线路纵联保护设计方案、系统配置、设备选择及工程应用。
The paper briefly introduces the design options, system configuration, equipment selection and engineering application of low-voltage short-line pilot protections in enterprise's power supply system.
通过正交实验并选择合适的供电制度及调整矿热炉用料结构等技术措施，找到了解决问题的方法，从而可以使生产正常进行。
Through orthogonal test, we work out the solution by selecting rational electric regulation and adjusting burden in submerged arc furnace, thus, the production can be operated smoothly.
低压电缆如选择与保护不当，直接影响供电系统的安全性、可靠性。
Improper selection and protection of low voltage cables will have direct impact on safety and reliability of the power supply system.
新加坡航空公司为您提供电影、音乐频道及其他娱乐等将近种选择！
Singapore Air gives you nearly choices of movies, music channels, and other entertainment.
供电方式可以选择常见民用外部电池，也可以选择带有充电功能的插头电源组。
Commercial external accessible batteries or accus as well as a plug power pack with integrated accu charging function can be used alternatively.
这些限制标准必将对电力电子装置及供电系统的设计者在电路选择和谐波抑制方面产生深刻的影响。
The standard limiting harmonics will deeply influence the designer on the selection of the power electronic equipments and the methods for limiting harmonics.
如果使用场合不能供电，则应选择柴油机驱动式；
If the usage situation, it can't power supply should choose diesel engine driving type;
通过本电池提供电力和补给时风吹或阳光普照时，可再生能源“风电，光电，成为一个连续供电更可行的选择。”受气候变化影响就少。
By discharging batteries to provide electricity and recharging them when the wind blows or sun shines, renewable energy becomes a much more viable option.
合理的选择补偿装置，可以做到最大限度的减少电网的损耗，提高电网的供电质量。
The efficient compensation system can maximize to reduce the grid less and increase grids supply quality.
阐述了地铁供电系统对电源的基本要求，对各种供电方式的特点及其选择作了简要分析。
The article describes the basic requirements for the power source of the metro power supply system, analyzes briefly the features of various power supply modes and their selection.
通过对两种典型的阴极电泳材料的电压试验、入槽供电方式的选择试验以及程序式分段电压控制试验，证实了阴极电泳涂装过程中电压控制的重要性。
The importance of voltage control during cathodic electrophoresis was proved through voltage tests, choice of methods for introducing current into bath and programmed step test of voltage control.
根据供电电网电压及中间直流回路电压给定，对主电路的元件参数进行了选择和优化。
According to source voltage and middle DC voltage command, the parameters of the rectifier are chosen and optimized.
随着船舶供电网络结构复杂程度和选择性保护要求的提高，将纵差动保护应用于船舶电力系统有着越来越大的实际意义。
With the improvement of Marine power supply network and high requirement of the selective protection, longitudinal differential protection has more practical meaning in Marine power system.
合理选择井下低压电缆截面，可为提高供电质量提供客观依据。
It can be to improve the quality of supply that the reasonable selection of underground low voltage cable cross section.
如果您选择不使用电池，它也可以供电给系统运作。
It also powers the system if you choose to operate without a battery.
本文结合准东线电气化工程供电的设计方案，说明选择AT供电方式和V/X接线牵引变压器的合理性。
With reference of the designing plan for power supply system in Zhun-Dong railway line, illustrates the rationality for adopting AT power supply mode and V/X wiring traction transformer.
本文结合准东线电气化工程供电的设计方案，说明选择AT供电方式和V/X接线牵引变压器的合理性。
With reference of the designing plan for power supply system in Zhun-Dong railway line, illustrates the rationality for adopting AT power supply mode and V/X wiring traction transformer.
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