对于文件的硬链接或符号链接的情况，此api将检查原始文件是否为空。
In case of hard or symbolic links to a file, this API checks whether the original file is empty.
我认为，对于符号的使用和理解，是人类大脑最原始也是最基本的特征。
The use and understanding of symbolizing signs is the most original, I think, fundamental characteristic of the human mind.
如果原始文件被删除，所有指向它的符号链接也就都被破坏了。
If the original file is deleted, all of the symbolic links become broken.
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