推理工作分两步进行：(1)将故障从大范围隔离到小范围；(2)小范围故障诊断。该系统已投入运行。
The reasoning operations proceed on two steps: (1) separating the fault in large scope into that in small scope, (2) then diagnosing the fault in small scope.
近些年来，学科已经细化到了相当的程度以至于学者们的理念只影响小范围的人群。除非学者们能拥有影响到大范围的人群，否则他们的理念将几乎毫无用处。
Academic disciplines have become so specialized in recent years that scholars' ideas reach only a narrow audience. Until scholars can reach a wider audience, their ideas will have little use.
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