光的理论实际上是弹性介质振动的理论。
晏子春秋
真相是一种武器,就像任何武器一样,它可以用于善或恶。
可持续性不是一种选择;而是我们对后代的责任。
In this ever-changing society, the most powerful and enduring brands are built from the heart. They are real and sustainable. Their foundations are stronger because they are built with the strength of the human spirit, not an ad campaign.
The human being is not the lord of beings, but the shepherd of being.
形式化方法的美在于它们能够提供关于系统正确性的绝对确定性。