But only if they operate at near capacity, otherwise, their overall efficiency is poor.
但只能是在它们接近满负荷运转的情况下，否则整体效率就会很低。
Poor IAQ will have great harm to people's health and working efficiency.
不好的室内空气品质将对人的身心健康和工作效率造成巨大的不利影响。
The efficiency of oil recovery with water flooding process is poor in low-permeability oil reservoirs.
低渗透油藏注水开发效果差、采收率低，而采用气驱技术是动用此类难采储量的有效方法之一。
The efficiency of oil recovery with water flooding process is poor in low-permeability oil reservoirs.
低渗透油藏注水开发效果差、采收率低，而采用气驱技术是动用此类难采储量的有效方法之一。
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