convergent power series

例句：

1. 1.The convergence of the series is slow, but it eventually converges to a finite value.
   这个级数收敛得很慢，但最终会收敛到一个有限值。
2. 2. The convergence of the series is important for the stability of the solution.
   这个级数的收敛性对于解的稳定性很重要。
3. 3. The convergence of the series can be used to estimate the error in the calculation.
   这个级数的收敛性可以用来估计计算中的错误。