Casper's rule

例句：

1. 1. The book is based on Casper's rule of thumb.
   这本书基于卡斯珀的金科玉律。
2. 2.According to Casper's rule, the sun rises in the east and sets in the west.
   根据卡斯珀的规则，太阳从东方升起，在西方落下。
3. 3. In his speech, he cited Casper's rule as a reason for his decision.
   在他的演讲中，他引用了卡斯珀的规则作为他决定的原因。