sustainer unit

例句：

1. 1. This machine is a sustainer unit for the power supply system.
   这台机器是电力供应系统的维持单位。
2. 2.The new policy aims to sustainer the economy through tax cuts.
   新政策旨在通过减税来维持经济。
3. 3. The company's sustainability report highlights its sustainer unit efforts in reducing waste.
   公司的可持续发展报告强调了其减少废物的维持单位努力。