• 1. sum of series: 级数的和 | 级数和 | 级数的值
• 2. Sum of series formula: 级数求和公式
• 3. partial sum of series: 级数的部分和

更多释义

• 1.Because they have same convergence region, sum of series and combinational twin identifies was obtained using the method of substitution.
  它们有相同的收敛区间，应用代入法求出它们的级数和，从而获得孪生组合恒等式。
  dict.yoduao.com
• 2.Life is a series of collisions with the future; it is not the sum of what we have been, but what we yearn to be.
  生活就是一系列与未来之间的碰撞；它不是我们过去曾经是什么的总和，而是我们将来想要成为什么的总和。
  dict.yoduao.com
• 3.That’s why you don’t usually see a series of 99-cent charges on your credit card bill; they are processed as one lump sum.
  通常你在信用卡账单上看不到一串串有不到1元零头的费用，就是这个原因，这些费用已经汇总计算了。
  dict.yoduao.com

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