Happiness depends on the inner self, not the external world.
柠檬问题发生的原因是卖家比买家更了解产品，从而导致市场失灵。
Technology will be the great enabler in reducing emissions while meeting energy needs.
The worst evils in history have always been committed by those who truly believed they were combating evil. Beware of combating evil.
The key to security is not to trust anyone, including yourself.