On the base of summing up some academic history concerned, the article collates and sorts out the contents of the observations.It focuses on the accuracy and the historic influence of the observation.

• 在总结有关学术史的基础上，本文试图对观察的内容作分类整理，在此基础上，侧重探讨这一观察的“准确度”，并考察这种观察所产生的历史影响。