求翻译：而每一编中作者都先提纲挈领地把本部分的重点内容明确罗列出来，然后逐一陈述，每编最后都有精彩的小结以升华主题。在每一段中，作者都在天头处加了提要性的短语，以方便读者掌握文章重点，提高阅读效率。读完《西洋史》，大致能明白作者文章经纬是：是什么意思？

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In each part of the author is first recapitulation of this section focus on the content clearly set out, and then one by one, each program statement is the summary to sublimate themes. In each of the above, the author, in the days and the executive summary of the the phrase, to facilitate readers ha

But every one arranges the authors all first efficiently to be clear about this part of key contents displays, then stated one by one, arranges every time finally all has the splendid subtotal to sublimate the subject.In each section, the authors all added the abstract phrase in the upper margin, by

And each author are outlined in the addendum to this part of the focus of the content clearly set out, and this will be stated, finally has a wonderful summary of each addendum to sublimate the theme. In each paragraph, authors were added at the head margin summary phrases to facilitate readers to g

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