·2,447,543篇论文数据，部分数据来源于NoteExpress
因为它们都是现成的产品，所以应该可以收集到很多信息，包括日志文件、任务完成率和次数、故障率和故障点等等。
Since these are existing products you should have a wealth of info, such as, log files, completion rates and times, drop out rates and drop out points, etc.
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