效率是把事情做对，效果是做对的事情。
Efficiency is doing things right; effectiveness is doing the right things.
If you're competitor-focused, you have to wait until there is a competitor doing something. Being customer-focused allows you to be more pioneering.
The bond between humans and livestock is one of the oldest and most vital partnerships in history.
劳动力市场比传统模型假设的更具适应性。