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.
往复摇动10次利用每粒级质量算出每次筛分平均粒度组成。
However in impoverished areas, most of teachers' professional quality is under the average national level due to some subjective or objective factors.
而受许多主、客观因素的影响，贫困地区教师队伍的总体素质还低于全国平均水平。
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.
长期以来，如果把劳动力素质考虑进去的话，该国的生产力一直低于所预期的平均水平。