translation.en: This means that we can identify a match even if the copy used is just a portion of the original file, plays it in slow motion and has degraded audio and video quality.
translation.zh: 这意味着我们能决定一个匹配， 即便副本仅使用了原文件的一部分， 用慢动作播放， 降低了音频和视频的质量。