能量守恒定律不仅是一条经验法则，更是思维的必然要求。

Data abstraction is the reduction of a particular body of data to a simplified representation of the whole.

理解就是感知模式。

The man who is anybody and who does anything is surely going to be criticized, vilified, and misunderstood. This is part of the penalty for greatness, and every great man understands it.

今天种植的每一棵树都是留给后代的遗产。