一句棘手的英文句子翻译

我从网上找到了你所说的原文,这是一段人与企业成功与否关系的论述,有From Good to Bad, 有From Good to Evil, 也有From Bad to Good的例子,作者强调的是企业的好坏不一定与人的好坏形成一定的关系,而以下这段文字描述的正是这家企业“Bad”到什么程度,（你问的一句话就摘自其中）：（后面还有一段描述它是怎么变好的,省略）
The reasons for closing the plant were sound: GM-Fremont ranked at the bottom of GM’s plants in productivity and was producing one of the worst-quality automobiles in the entire GM system. A militant union averaged 5000 to 7000 grievances per three-year labor contract. The plant was characterized by high use of sick leave, slowdowns, wildcat strikes and even sabotage. First-line managers were know to carry weapons for personal protection. Daily absenteeism was almost 20 percent, and drug abuse and alcoholism plagued the workforce.
所以根据以上情况,你的理解是对的.所 以这句句子可以翻译为：
好斗的工会为每一个3年劳工合同平均要发5000至7000次的牢骚.（说明企业已经如此之糟糕）