best-fit polynomial approximation

例句：

1. 1. Themodel's performance is best-fitto the data it was trained on.
   该模型的性能与它训练的数据最佳匹配。
2. 2.The software uses a best-fit polynomialapproximation to predict future trends.
   该软件使用最佳拟合多项式近似来预测未来趋势。
3. 3. The engineer used a best-fit polynomial approximation to optimize the design ofthe machine.
   工程师使用最佳拟合多项式近似来优化机器的设计。