volume variance

例句：

1. 1. The company's sales volume has increased significantly since the new product launch.
   自从推出新产品以来，公司的销售额显著增加。
2. 2. The volume variance in the data is due to a sudden spike in demand.
   数据中的体积变化是由于需求突然激增造成的。
3. 3. The research team found that the volume variance was due to seasonal variations in production.
   研究小组发现，体积变化是由于生产季节性波动造成的。