It also assumes that in the body selector, the value of the font size property is set to 1em.
它还假设在正文选择器中，字体大小属性的值被设置为1em。
Listing 5 shows the font size property for the body selector as 1 em.
清单5显示正文选择器的字体大小属性为1 em。
Assume the default base font of 16px has been reduced to 62.5% for the body selector, shown in Listing 4.
假设正文选择器的默认基本字体16 px变为原来的62.5%，如清单4所示。
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