债务要么产生于契约，要么产生于侵权行为。

在没有其他信息的情况下，参数的最佳估计是其样本值。

Capitalism, then, is by nature a form or method of economic change and not only never is but never can be stationary.

The world is a book, and those who do not travel read only one page.

The most important political distinction among countries concerns not their form of government but their degree of government.

I don't need a reason to be authentic.

Drone safety is not an option, but a baseline.