The integral upper limit function strengthened between the differential and the integral relation, is the definite integral fundamental formula rationale.
积分上限函数加强了微分和积分之间的联系，是定积分基本公式的理论基础。
The integral upper limit function strengthened between the differential and the integral relation, is the definite integral fundamental formula rationale.
积分上限函数加强了微分和积分之间的联系，是定积分基本公式的理论基础。
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