说明：  利用一个三输入两输出的两层BP神经网络训练一个输入为[1 1 1 1 1 1],期望的输出为[1 1]的神经网络系统。
(Using a three-input two-output two-BP neural network training input for the [1 1 11 11], the desired output is [11] the neural network system.)