The energy captured by space-basedphotovoltaic arrays would be converted into microwaves for transmissionto Earth, where it would be transformed into direct-current electricity.

空间光电池阵列所收集到的电力将在转换成微波后发射到地球，再在地面上转换成直流电。

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C voltage divider includes switching power and electricity - transformation, so that it can be used to design lower voltage of direct current power.

直流分压器集开关电源和电能变换于一体，可以用来设计降压型直流电源。

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The electricity character of karst cave has much difference than that of wall rock, so the surveying method of direct current can find out if there be karst cave underground.

由于地下岩溶与周围围岩存在明显的电性差异，可以通过直流电法勘探查明地下是否存在岩溶形态。

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Even Thomas Edison bet badly, as in his development of direct-current electricity that proved inferior to alternating current.

WSJ: Boeing Shows How Innovation Can Be Messy

Its high-voltage direct current system is delivering electricity to the British Petroleum platform in the middle of the ocean.

FORBES: Magazine Article