12月1号，家长们在诉讼书中称楼舍质量不合格和救援不力导致了不必要的死亡。
The parents' complaint, presented on Dec. 1, alleged that a substandard building and inadequate rescue efforts led to unnecessary deaths.
因此，这是一种延长诉讼过程和增加不必要费用的无用的努力。
Thus, there is a duplication of effort that lengthens the process and increases costs unnecessarily.
此法能使人避免诉讼的纠缠，正常生活不致不必要的中断。
It is the methods of protection of oneself from lawsuits and unnecessary disruption of normal life.
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