The burst of light is called a photon echo; and its observation proved we have full control over the quantum state of the atoms.
辐射出的光被称为光子回波，它的观测表明我们对于原子的量子态进行了完全的控制。
Since x-rays travel at the speed of light, the echo indicates that an object fell into the black hole around 350 years ago.
因为X射线以光速运行，因此反射表明，大约在350光年前，有一个物质落入黑洞。
As day defeats the night, the echo of your voice that greets the feeble morning light is the only answer to my silent prayer and promises I never make.
但白天取代黑夜之时，你那迎接微弱晨光的声音回响就是对我无声的祈祷和从未许下的承诺的唯一回应。
The birdsong is the echo of the morning light back from the earth.
鸟的歌声是曙光从大地反应从前的回声。
The birdsong is the echo of the morning light back from the earth.
鸟的歌声是曙光从大地反应从前的回声。
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