每一位物理学家都确切地知道什么是第一和第二定律，但是根据我的经验没有两个物理学家的认识是相同的。
Every physicist knows exactly what the first and second laws mean, but it is my experience that no two physicists agree on them.
“那就好'老板说，“但是为什么呢星期一和星期二都没来呢？””
"That's fine," roared the boss, "but where were you Monday and Tuesday?"
“那就好'老板说，“但是为什么呢星期一和星期二都没来呢？””
"That's fine," roared the boss, "but where were you Monday and Tuesday?"
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