Objective: to approach the methods of dealing with difficult factors in LC.

目的：探讨腹腔镜胆囊切除术(LC)中困难因素的处理方法。

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Changing business needs make scope and quality the two most difficult factors to manage.

不断变化的业务需求使得范围和质量成为两个最难管理的因素。

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Conclusion There are a lot of difficult factors of carrying out quality management circle activity. Managers should put out corresponding countermeasures.

结论护理品管圈活动推行存在较多困难因素，管理层要采取相应对策。

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Those factors made it very difficult for radar to detect the vessel before it crossed into North Korean waters.

VOA: standard.2009.07.30

There is a lot of research showing how difficult it is to change happiness based on external factors.

很多研究表明,基于外在因素改变快乐很难。

哈佛公开课 - 幸福课课程节选

"It's so difficult to take other factors into account - for example, moderate drinkers might have a better social environment, " he told BBC News Online.

BBC: Alcohol 'improves IQ'

Despite the improvements, there are still many factors that are difficult to include in models.

BBC: 'Best estimate' for impact of melting ice on sea level rise

Unfortunately, other confounding factors make this difficult.

ECONOMIST: The science of climate change