The comfort of the rich depends upon an abundant supply of the poor.
质数就是当你把所有模式都剔除后剩下的东西。我觉得质数就像生活,它们非常有逻辑性,但你永远无法找出规律,即使你花上一辈子时间去思考。
"We are all connected, and our actions have consequences that ripple through the lives of others."
能源危机是一个可以解决的问题——如果我们现在行动的话。