它们以光速传播，而且是一起传播。
He showed they would travel with the speed of light and would travel together.
电磁波，以光速传播，也就是30万公里，每秒。
Electromagnetic waves travel with the speed of light, which is 300,000 kilometers per second.
这种能量是一种电磁辐射，所以以光速传播，不需要承载媒质。
The energy is electromagnetic radiation and so travels at the speed of light and does not require a medium to carry it.
它们的质量非常接近零，因此，即使在中等能量下，我们也希望它们以光速传播。
They are very nearly massless and thus, even at moderate energies, we'd expect them to travel essentially at the speed of light.
闪亮的回击以光速的一半速度上行传播，由于它的速度太快，在一张图象中不能捕捉到这一过程。
The bright return stroke travels upward at around half the speed of light, and is too fast to capture in more than one image.
科学家发现，单个光子的前驱波头一般以光速c传播，就像由大量光子携带的信号的传播速度一样。
The scientists found that the precursor wave front of a single photon always travels at c, like the signal velocity of large groups of photons.
我们确定，主波包传播的速度不能超越以光速c传播的前驱。
We are sure that the main wave packet cannot travel faster than the precursor, which travels at c.
电力系统中网络结点千百个交织密布，有功潮流、无功潮流、高次谐波、负序电流等以光速在全系统范围传播。
Power system Network Node thousands of mixed clouds, active power, reactive power flow, high harmonics, negative sequence current of the speed of light in the system-wide communication.
电力系统中网络结点千百个交织密布，有功潮流、无功潮流、高次谐波、负序电流等以光速在全系统范围传播。
Power system Network Node thousands of mixed clouds, active power, reactive power flow, high harmonics, negative sequence current of the speed of light in the system-wide communication.
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