求翻译：曼昆的经济学原理是平民学习经济学的福音，全书没有复杂的数学知识，也没有难懂的抽象概念，是一本适合大众阅读的书籍。是什么意思？

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Mankiw's civilian population is studying Economics Economics the gospel throughout the book, no complicated mathematical knowledge, there are no cryptic abstraction, is suitable for public reading books.

The graceful elder brother's principle of economics is the common people studies the economic the gospel, entire book not complex mathematics knowledge, also does not have the abstract concept which difficult to understand, is one the books which suits the populace to read.

Mankiw's principles of Economics studying economics were civilians of the Gospel, the book there are no complicated mathematics, nor difficult to understand the abstract concept, is a suitable for public reading of the book.