The current five-year plan, which contains few other numerical targets, envisages a 10% reduction in concentrations of the worst air pollutants and a 20% increase in energy efficiency over the period.
现行的五年计划，其包括的数字目标没有几个，设想这期间最差的空气污染物的浓度减少10％，能源效率增长20％。
The small current of the slow pulse could efficiently decrease the ionic concentration polarization and increase the charging efficiency.
慢脉冲中的小电流有效地控制了离子浓差极化，提高了充电效率。
It could help not only to increase the cathodic current efficiency of the chromium-plating solution, but also to obtain smooth appearance, high hardness and wearability of chromium electrodeposits.
该法既提高镀铬液的阴极电流效率又降低生产能耗，可获得光亮平滑、硬度高、结合力好的镀铬层。
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