production cost variances

例句：

1. 1. The company's production cost variances have increased significantly in the past year.
   该公司的生产成本差异在过去一年显著增加。
2. 2.The variances in production costs are a major concern for the company.
   生产成本的差异是公司的主要担忧。
3. 3. To improve efficiency, the company is looking into reducing its production cost variances.
   为了提高效率，公司正在考虑减少其生产成本差异。