sustainer

例句：

1. 1. The company's sustainability efforts have been recognized by the government.
   该公司的可持续性努力得到了政府的认可。
2. 2.The new policy aims to sustain the economy in the long run.
   新政策旨在长期维持经济。
3. 3. The farmer is a sustainer of the local ecosystem.
   这位农民是当地生态系统的维持者。