授课老师：吴老师AA young man asked Albert Einstein , the great German scientist , what the secret of success is. The scientist told him that the secret of success is hard work. A few days later the young man asked the same question again . Einstein was very annoyed He did not say anything ,but wrote a few words on a piece of paper . On it was written: A=X+Y+Z.“What does this mean ?” asked the young man .“A means “ success” explained the old scientist . “X stands for hard work ,Y for good met
