无线电波是一种我们看不见的电磁辐射。

Radiowaves are electromagnetic radiation that we can't see.

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微波也是一种电磁辐射，这与阳光和无线电波都是非常相似的。

Microwaves are a form of electromagnetic radiation that is very similar to sunlight and radio waves.

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威尔逊和彭齐亚斯捕捉人造卫星上反弹回来的无线电波的天线时不经意地发现了宇宙微波背景辐射，而这正是宇宙大爆炸的物理性证据。

And Wilson and Penzias discovered the cosmic microwave background radiation, physical evidence for the Big Bang, while fiddling with an antenna designed to catch radio waves bouncing off satellites.

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