experimental expense

例句：

1. 1. The company spent a considerable amount of money on research and development.
   该公司在研究和开发上花费了大量资金。
2. 2.The government has been accused of spending too much on unnecessary programs.
   政府被指责在不必要的项目上花费过多。
3. 3. The new project requires an experimental expense of $50,000.
   新项目需要5万美元的实验费用。