Neural networks are computer systems which mimic the workings of the brain.神经网络是模拟大脑工作方式的计算机系统。Neural networks can learn solutions to difficult problems.类神经网络能学习如何解决问题的办法。Our internal wiring has not changed much since the time of our hairy ancestors.从我们的多毛祖先以来，我们的体内神经网络并没有发生多少变化。