Containing block horizontal constraint. A left float box's left margin edge may not be to the left of the containing block's left padding edge.
包含块的水平限制：左浮动框的marginedge不能在包含块的左padding edge框的左边。
Containing block vertical constraint. A left float box's top margin edge may not be higher than the containing block's top padding edge.
包含块的垂直限制：左浮动框的上marginedge不能高于包含块的上padding edge。
The padding edge defines the edges of the containing block.
paddingedge定义了此包含块的边缘。
If the float is nested inside the second block box, and that container box has no borders or padding, it appears just the same as when the float is between the block boxes.
如果浮动被嵌套在第二个块盒中，并且该容器盒没有边框盒填充，浮动呈现样式，与浮动被放置在块盒之间是相同的。
Otherwise, the containing block is formed by the padding edge of the ancestor.
否则，包含块是由祖先的内边距边缘构成。
For example, if the block length is 64 bits and the last block contains only 40 bits, 24 bits of padding are added. see the.
例如，如果块长度为64位，而最后的块只包含40位，则会添加24位的填充字元串。
There are modes of operation such as AES-CBC and the insecure AES-ECB that do require padding, as they encrypt/decrypt per block as well.
有操作模式，例如AES-CBC和不安全的AES-ECB，它们需要填充，因为它们也对每个块进行加密/解密。
For example, if the block length is 64 bits and the last block contains only 40 bits, 24 bits of padding are added.
举例来讲，如果区块长度为64位元，而最后一个区块只有40位元，那么就会加入24位元的填补。
In the case that the ancestor is an inline element, the containing block is the bounding box around the padding boxes of the first and the last inline boxes generated for that element.
在祖先是行内元素的情况下，包含块是由第一个和最后一个内联元素的内边距盒的包含盒构成。
In the case that the ancestor is an inline element, the containing block is the bounding box around the padding boxes of the first and the last inline boxes generated for that element.
在祖先是行内元素的情况下，包含块是由第一个和最后一个内联元素的内边距盒的包含盒构成。
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