A mathematical truth is universal and eternal.

如果意味着忠于自我，就别害怕打破规则。

只要不放弃，梦想终会实现。

The psychologist must be a meticulous observer.

可持续性不是一种选择，而是我们对后代的责任。

To tax the larger incomes at a higher percentage than the smaller， is to lay a tax on industry and economy； to impose a penalty on people for having worked harder and saved more than their neighbors.