本研究提出了微孔曝气最优气泡群的确定方法，并采用最大气泡群常数终值来表征该气泡群。
This paper puts forward the calculation of optimal bubble group and uses maximum bubble group constant to evaluate this group.
应用双群理论计算了反应堆堆芯物理常数。
The physical parameters of the reactor core are calculated by method of the two-group theory.
南方山谷里的猩猩，常常数十成群地生活在一起。
The gorillas2 in the valleys in the south often lived together in groups of several tens.
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