When working with a fixed width design, be sure to at least center the wrapper div to maintain a sense of balance (margin: 0 auto; usually does the trick).

如果要使用固定宽度设计，务必保证主容器居中对齐，以保持平衡(一般利用margin：0auto；就可以了)。

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Returns the width of the element, in pixels. This width does not take into account any margin, border, scroll bar, or padding that might have been applied to the element.

返回，用像素，来表示的元素宽度，这个宽度不包括边框和状态条那些东东。

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Returns the width of the element, in pixels. This width does not take into account any margin, border, scroll bar, or padding that might have been applied to the element.

返回，用像素，来表示的元素宽度，这个宽度不包括边框和状态条那些东东。

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