labor usage variance

例句：

1. 1.The company's labor usage variance has increased significantly since the implementation of the new policy.
   自从实施新政策以来，公司的劳动使用差异显著增加。
2. 2.The variance in labor usage is a significant factor affecting the efficiency of the production process.
   劳动使用的变异是影响生产效率的一个重要因素。
3. 3. To improve productivity, it is important to analyze and reduce labor usage variance.
   为了提高生产力，重要的是分析和减少劳动使用差异。