The interaction between the input and output was discussed with system analysis method, and the critical point was determined and validated with Chow test method.
用系统分析的方法确定投入产出要素之间的相互作用，用邹氏检验法确定并验证临界点。
The interaction between the input and output was discussed with system analysis method, and the critical point was determined and validated with Chow test method.
用系统分析的方法确定投入产出要素之间的相互作用，用邹氏检验法确定并验证临界点。
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