通过19年来的观测，哈勃空间望远镜已经建立了一个巨大的档案库——这中间就可能包含还未发现的系外行星的踪迹。
In 19 years of observations, the Hubble Space Telescope has amassed a huge archive of data — an archive that may contain the telltale glow of undiscovered extrasolar planets.
档案的串连也会是问题。例如，当档案合并时不需要的字元会出现在资料中间。
Concatenation of files can be a problem also, for example, when files are merged in such a way that an unnecessary character can end up in the middle of data.
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