In this paper, the kinetic power theorem is used for solving the problem of interaction between a relativistic electron beam moving in a static magnetic field and a travelling electromagnetic wave.

本文利用动功率定理求解静磁场中运动的相对论性电子束与波导中电磁行波的相互作用问题。

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Movement produces kinetic energy, which can be converted into power.

移动产生热动能，这些可以转化成电能。

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Applying what they had learned about their enemy, the machines turned to an alternate and readily available power supply: the bioelectric, thermal, and kinetic energies of the human body.

机器人运用他们所学到的关于人类的知识，找到了一种新的能源供给：从人类的身体上，提取生物能，热能以及动能。

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Other sources of power could include a kinetic power source similar to those found on some wristwatches.

FORBES: Apple Patent For Solar Watch Could Fire Up Stock Again

Such solutions are clearly some way off commercial development, but with Apple rumored to be designing its hotly-anticipated iWatch around a power source based on kinetic and solar power, a battery-free world isn't such a distant dream.

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Hamilton, 24, said the Kers (Kinetic Energy Recovery System) power-boost system - which Ferrari are also using - proved "anything can happen" and the Briton is optimistic he can replicate the pace he found in Hungary.

BBC: McLaren talk up Kers 'advantage'