认为有钟声会信号投资者何时进入或退出股市的想法根本不可信。
The idea that a bell rings to signal when investors should get into or out of the stock market is simply not credible.
The past is what you remember, imagine you remember, convince yourself you remember, or pretend you remember.
经济学家的角色既是科学家，又是工程师。
The dead are our teachers, if we know how to listen.
监管是必要的，但过度监管可能有害。