semi-variable expense

例句：

1. 1. The company's expenses are mainly driven by semi-variable costs.
   公司的开支主要由半变量成本驱动。
2. 2.In this model, the semi-variable expense is calculated based on the sales volume.
   在这个模型中，半变量费用是基于销售量来计算的。
3. 3. The company needs to monitor and control its semi-variable expenses effectively.
   公司需要有效地监控和控制其半变量费用。