沉默是那些看得太多的人的语言。
Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.
Psychology must be grounded in the reality of the organism's struggle to exist.
我遇到的那些让我钦佩的人,无一例外都比我读的书多。
经济周期不仅仅是围绕确定性趋势的波动;它们代表了趋势本身的转变。