When writing structural markup, think in terms of top to bottom and left to right because that's the accepted convention.
当编写结构型的标记时，按从上到下从左到右的顺序，这是不成文的规范。
When writing structural markup, think in terms of top to bottom and left to right because that's the accepted convention.
当编写结构型的标记时，按从上到下从左到右的顺序，这是不成文的规范。
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