It will also be capable of evaluating definite integrals and Riemann sums.

同时，它还可处理定积分和黎曼积分。

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This paper sums up the common character of the concept of many integrals, abstracts the concept of Riemann integral and gives the integral conditions of the Riemann integral.

分析了诸多积分概念的共性，抽象出黎曼积分的定义，给出了黎曼可积的条件。

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