In principle, all the power needs of the United States could be provided by exploiting the wind potential of just three states—North Dakota, South Dakota, and Texas.

原则上，美国所有的电力需求，只开发三个州——北达科他州、南达科他州和得克萨斯州——的风能潜力就可以满足。

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The units can be used to generate tiny amounts of power, and in principle, giant dipping birds could be constructed which would generate more power.

这些装置可以用来产生少量的能量，而且原则上，可以制造出能产生更多能量的巨型蘸水鸟。

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The control scheme and operating principle of a double closed-loop AC/DC power converter system are discussed by using physics.

从物理角度讨论了双闭环交/直流功率变换器系统的控制方案和工作原理。

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Using the passive-power principle found in crystal radios, the method has proved successful over short distances in places where it is difficult to replace batteries or carry out maintenance.

ECONOMIST: Wireless charging

Reduced to their essence, the endangered order can be defined as a government of, by and for all the people, one rooted in the principle that power must be exercised, pursuant to the rule of law, in representative and accountable ways.

CENTERFORSECURITYPOLICY: ��Here, the people rule��

But we can do no greater honor to her memory than to carry forward the power of her principle and a courage born of conviction.

WHITEHOUSE: President Obama Dedicates a Statue Honoring Rosa Parks