清单5显示正文选择器的字体大小属性为1 em。

Listing 5 shows the font size property for the body selector as 1 em.

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然后将这个结果添加到字体大小属性，如清单 11 所示。

Then I add the result to the font size property like shown in Listing 11.

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它还假设在正文选择器中，字体大小属性的值被设置为1em。

It also assumes that in the body selector, the value of the font size property is set to 1em.

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