Surprisingly, last does not force a clear to reposition any elements that follow; it merely sets the right margin to 0, which overrides the default right margin of 10 pixels in span-n.
令人惊讶的是，last并未明确强制重新配置其后的任何元素；它仅仅将右边距设置为0，这将覆盖span - n中10像素的默认右边距设置。
Surprisingly, last does not force a clear to reposition any elements that follow; it merely sets the right margin to 0, which overrides the default right margin of 10 pixels in span-n.
令人惊讶的是，last并未明确强制重新配置其后的任何元素；它仅仅将右边距设置为0，这将覆盖span - n中10像素的默认右边距设置。
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