In the Spring and Autumn Period, a man named Bo Le is an expert in identifying a good horse.

春秋时期，有个人叫伯乐，他非常善于鉴别马匹。

He put his experience in this area into his book Physiognomy Of Horses, which illustrated all kinds of horses with rich pictures and words.

他将自己这方面的经验写成了一本书《相马经》，书中图文并茂地介绍了各类马匹。

His son wanted to learn his skill about identifying a good horse. Then he read the book carefully over and over again.

他的儿子想学到识马的本领。于是就把父亲的这本书反复诵读。

He thought he had mastered the skill.

之后，他就以为自己已经掌握了这个本领。