自由不是没有主人,而是选择自己的主人。
To be free is not to have no master, but to choose your own.
糟糕战略最常见的来源是无法做出选择。
The concept of progress is inseparable from the concept of catastrophe.
The earth's resources are finite, but human ingenuity is not.
相信自己能行,你已经成功了一半。