如果没有这些信息，那么文件将被认为遭到破坏和不可用。
Without with this information, a file would appear corrupt and unusable.
如果不输出记录的剩余部分，就没有这些信息。
If no trail record was printed, this information would not be present.
如果暂时还没有这些信息，您尽可以使用它们的默认值，以后再进行更新。
If you don't have all the information now, feel free to use the provided default values and update them later.
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