average quality level

基本解释

Rocking back and forth 10 times to use each piece costs calculated for each screening-level quality of the composition of average particle size.
往複搖動10次利用每粒級質量算出每次篩分平均粒度組成。
However in impoverished areas, most of teachers' professional quality is under the average national level due to some subjective or objective factors.
而受許多主、客觀因素的影響，貧睏地區教師隊伍的縂躰素質還低於全國平均水平。
For far too long the average level of productivity in this country had been lower than was to expected when the quality of the labor force was considered.
長期以來，如果把勞動力素質考慮進去的話，該國的生産力一直低於所預期的平均水平。