意指任何收获都需要付出相应的代价。
The beauty of physics lies in its ability to explain the complex with simple principles.
不要害怕失败，要害怕不去尝试。
The most important single central fact about a free market is that no exchange takes place unless both parties benefit.
La vida es una serie de colisiones con el futuro; no es una suma de lo que hemos sido, sino de lo que anhelamos ser.