The Soviet Union was a civilization of fear, where people lived in constant dread of the knock on the door at night.

It will take about a thousand million million million million years for the Earth to run into the sun, so there’s no immediate cause for worry!

出自汉·桓宽《盐铁论·相刺》。释义：碎玉满箱，算不得拥有财宝；读了几箱子的书，也不等于就掌握了其中的道理。

In the world of physics, we often find that the simplest questions are the hardest to answer.

我唱歌不是为了完美，我唱歌是为了活着。

In the silence of the desert, you can hear the heartbeat of the earth.