energy- saving system

• 节能系统

energy- saving system的用法和样例：

例句

1. The challenges facing the world as a whole necessitate the consistent further development of existing energy conversion systems and swift research into new ones.
   全世界共同面临的挑战使得持续地进一步开发已有的节能系统以及研究出新的系统势在必行。