expense fund

例句：

1. 1. We need to set up an expense fund for the upcoming trip.
   我们需要为即将到来的旅行设立一个费用基金。
2. 2.The company has established an expense fund to help employees save money.
   公司已经设立了一个费用基金，帮助员工节省开支。
3. 3. The expense fund is used to cover unexpected costs during the project.
   费用基金用于项目期间应对意外成本。