在利用活化法进行中子能谱测量中，活化箔的多群截面是必须的输入参数之一。
The multiple group cross sections are indispensable when we want to obtain the neutron spectrum by multiple foil activation method.
在利用活化法进行中子能谱测量中，活化箔的多群截面是必须的输入参数之一。
The multiple group cross sections are indispensable when we want to obtain the neutron spectrum by multiple foil activation method.
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