形容时光飞逝，人生易老，鸡鸣和马蹄声象征着时间的流逝
人的一生)是祸是福都是自已种下的因果关系(招来的)。
Survival can be summed up in three words – never give up. That’s the heart of it really. Just keep trying.
The essence of mathematics lies in its freedom.
The first rule of quality is that it must be defined.