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。
"I believe in the power of storytelling. It's how we make sense of the world."
性就像金钱;只有太多才足够。
历史是记忆的不完美与文献的不足相遇时产生的确定性。
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.