这就是效率。
This is the very source of efficiency of free market.
这正是自由市场具有效率的根源。
Sewage source heat pump systems are environmental protection, high efficiency and energy saving.
污水源热泵是高效的环保节能系统。
Hydrogen is an alternative energy source with high efficiency and pollution free.
氢能是高效、环保型替代能源。
Lighting source: Low light-declining LED, long lifetime, energy saving, high efficiency and environment protective.
使用光源：一律采用低光衰大功率的LED作为光源，以确保其长寿命、节能、高效、环保的特点。
Lighting source: Low light-declining LED, long lifetime, energy saving, high efficiency and environment protective.
使用光源：一律采用低光衰大功率的LED作为光源，以确保其长寿命、节能、高效、环保的特点。
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