A child font size in one selector becomes a parent font size in another selector in the lower level in the hierarchy of selector sets.

其中一个选择器中的子字体大小，将成为处于选择器集合中较低层次的另一个选择器的父字体大小。

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For any further alterations of the font size, we used the percentage unit to preserve proportionality if the browsers default font size is changed by the user.

对于以后对字体大小的任何修改，我们都使用百分数。因此，如果用户改变了浏览器的默认字体大小，所有文字都会保持比例。

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In the third layer, the child font size in the second layer becomes the new parent font size.

在第三个层中，第二层的子字体大小变为新的父字体大小。

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That meant notes about font selection, font size, leading, tracking, kerning and other such arcana.

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Reader can change the font size and the font.

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That button also lets you buy the book (in the case of a sample), skip to a specific page, bookmark, look up a word in the including Collins dictionary, view the book's table of contents, and adjust the font size -- there are eight font sizes in all.

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