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

The beauty of mathematics is that it allows us to abstract away from the physical world and focus on the underlying principles.

技术应该服务于土地，而非支配它。

世界充满了神奇的事物，耐心地等待着我们的感官变得更加敏锐。