In addition, the position is relative to its parent element, not the whole document.
此外，位置是相对于它的父元素，而不是整个文档。
Text document is difficult to hide information for its relative little redundancy.
由于文本所包含的信息冗余量少而难以在其中隐藏信息。
Text document is difficult to hide information for its relative little redundancy.
由于文本所包含的信息冗余量少而难以在其中隐藏信息。
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