爱因斯坦曾经拒绝以色列总统的职务,他说自己只适合于从事与物理学有关的事情。齐白石九十岁的时候,翻出自己七十岁的画稿阅读,说:“我年轻时画得多好!”笔者曾看过这样一幅漫画:有个小孩将7×3的结果写成了l 5,他爷爷看到后问:“你为什么写成了1 5?”孩子说:“我不管三七二十一,就写成了十五。” Einstein, who once rejected the presidency of Israel, said he is only fit for physics-related things. At the age of ninety, Qi Baishi turned up his seventy-year-old drawing and read, “How well I was when I was young!” I once read such a cartoon: a child wrote the result of 7 × 3 5. After his grandfather saw it, he asked, “Why did you write 15?” The child said, "I will write fifteen, no matter what time it is.