Let us again imagine an idealized experiment. A small sphere with an electric charge is forced, by some external influence, to oscillate rapidly and in a rhythmical way, like a pendulum.

我们再来设想一个理想实验，用某种外部影响迫使一个带有电荷的小圆球很快而且有韵律地像钟摆一样振荡起来。

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Or the hitter in a baseball game trying to concentrate on making contact with a small sphere coming at him at over 90 miles per hour while prone to curving or sinking at any time, all while tuning out 40, 000 or so screaming, clapping fans trying to energize the pitcher.

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