大粒径粒子较小粒径粒子的平均循环时间短，大颗粒通过喷动区的次数大于小粒子，生长较快。
The motion tracks of large-size particles are shorter than that of little size ones, and accordingly the average circulation-time are shorter with less effects of aeration velocity.
测试程序重复调用每种方法，使用一个大循环数，从而平均多次调用的时间衡量结果。
The test program calls each method repeatedly with a large loop count, averaging the time measurements over several calls.
实验结果表明，宽粒度分布物料的不同粒径粒子的运动路径不同，而造成了各自的平均循环停留时间不同。
The results show that the different motion tracks of different size particles of broad size materials lead to the different average circulation-time.
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