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1·This produces a waveform of one polarity operating at a frequency twice that of the mains supply.

经过整流后得到的是一个频率为交流电源两倍的单极波形。

2·Always make sure that the shredder has been disconnected from the mains supply before you disassemble it.

务必让该碎纸机已被断开的电源，然后再拆卸它。

3·Most Nigerians have no more than a few hours of mains supply a day—the economy's single biggest bottleneck.

大多数的尼日尼亚人每日的水电供应不超过数小时。这成为了国家经济的最大瓶颈。

4·Heat meters designed to operate from an ac mains supply shall be wired in accordance with wiring regulations applicable.

温度传感器由AC交流电源供应，配备的电线符合电线规章。

5·Flexibility and reduced stock holdings cause problems when different mains supply plugs are required for different markets.

当不同的市场需要不同的主控电源插座的时候，灵活性和减少存货两者之间可能会出现矛盾。

6·Numerous types of inverter are available, but not all are suitable for use when feeding power back into the UK mains supply.

许多类型的变换器是通用的，但不是所有的适合使用，当能连回到英国的供应。

7·The primary power supply is powered from the mains supply and energizes a lumped coil; the current ranges anywhere from 5 to125 amps.

主要的电力供给是来自市电电源并通过一个集合线圈激发；电流范围从5到125安培。

8·The utility model provides a wind-solar hybrid balcony generating power supply which does not use the mains supply but solar energy and wind energy.

本实用新型提出一种不用市电而用太阳能和风能的风光互补阳台发电电源。

9·However, this theory seems to be in conflict with evidence from parents of many of the children, who say they use the mains supply, which comes from other sources.

然而，这一理论似乎同许多病儿的父母提供的证据矛盾，他们说主要水源来自别的途径。

10·In areas where there are water scarcity issues, if we can take our factories off the mains supply, then that means there is more water available for the local community.

在水资源匮乏的地区，如果我们的工厂可以不再依赖供水管道，那么当地社区获得的供应就会更多。