在真空中，它们都以光速前进；它们都由彼此垂直的电磁矢量构成；它们都可以用光子来量化，等等。
In a vacuum they all travel at the speed of light; they are all composed of electric and magnetic vectors which are perpendicular to each other; they are all quantized as photons, and so on.
在真空中，它们都以光速前进；它们都由彼此垂直的电磁矢量构成；它们都可以用光子来量化，等等。
In a vacuum they all travel at the speed of light; they are all composed of electric and magnetic vectors which are perpendicular to each other; they are all quantized as photons, and so on.
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