对于我们要使用的所有XHTML元素选择器，将空白边和补白设置为零，从而防止浏览器应用默认样式，见清单3。
We chose to normalize all the XHTML element selectors we knew we wanted to use by setting the margin and padding to zero, as shown in Listing 3.
对于我们要使用的所有XHTML元素选择器，将空白边和补白设置为零，从而防止浏览器应用默认样式，见清单3。
We chose to normalize all the XHTML element selectors we knew we wanted to use by setting the margin and padding to zero, as shown in Listing 3.
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