Then there is the question of how the new methods compare with existing approaches.
那么，新算法和现行的方法比较起来如何呢？
The question is: how can you attach an existing file to a model?
问题是：如何能够将现有文件附加到模型呢？
The existing network test system also has some problems: The question type are quite few;
现有网络考试系统还存在一些问题，例如：题型比较少；
The existing network test system also has some problems: The question type are quite few;
现有网络考试系统还存在一些问题，例如：题型比较少；
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