For convenience, let us discuss it under twelve sub - headings.
为了叙述的方便, 分为十二个小题目.
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Therefore use single lines of text for your headings and sub headings.
因此,标题和副标题最好只有一行文字.
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Classification accordance with 4 sub - headings for reference Siku Head.
分类遵照四部,子目参照四库总目.
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Marginal head: Headings or sub - headings arranged to appear in the margin for easy reference.
栏外标题: 排在书页白边上的标题或副标题,它方便参考.
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Don't lean text against your graphics. Include white space between headings, sub headings and paragraphs.
图表四周不要紧跟文本, 要留些空白,当然还有标题之间, 副标题之间,段落之间都要留有空白.
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