sustainment

例句：

1. 1. The company's financial performance has been sustaining for several years.
   这家公司的财务状况已经持续了好几年。
2. 2.The government's policies are designed to sustain the economy during times of crisis.
   政府的政策旨在在危机时期维持经济。
3. 3. The project aims to sustain biodiversity and provide sustainable resources for future generations.
   该项目旨在维持生物多样性并为后代提供可持续资源。