A Limit of Riemann Sum 黎曼和的极限
Definition of Riemann Sum 黎曼和的定义
Riemann n sum 黎曼和
riemann lower sum 黎曼下和
riemann upper sum 黎曼上和
以上来源于: WordNet
It is very convenient to calculate the object volume to use Riemann sum after obtained the object surface region equation.
在已知空间物体表面区域方程的前提下，利用黎曼和可以方便地求出被测物体的体积。
It is difficult for learner to understand the concept of Riemann integral which is defined by using the limit of Riemann sum.
用积分和的极限定义的黎曼积分对于初学者来说是一个很难理解的概念。
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