这家工厂采用了高效节能的生产线，大大降低了运营成本。

The factory installed a ___highly-efficient production line, which significantly reduced operating costs.

这个高效系统能在30分钟内完成过去需要一整天才能完成的工作。

This ___highly-efficient system can complete tasks in 30 minutes that used to take a full day.