Explanations and details can be found in the pages that follow, but the average reader is advised to simply cut out the table below and carry it around for assistance in the (hereafter unlikely) event of confusion about the basic Principles of Economics.

• 解释和具体说明在以下几页会提到，但建议每个读者把表格减下来，随身带着它，万一对基本的《经济学原理》又迷惑时(尽管以后不大可能)，它会有帮助的。