https://developer.apple.com/machine-learning/
https://www.appcoda.com.tw/coreml-introduction/
https://developer.apple.com/videos/play/wwdc2017/703/
https://developer.apple.com/videos/play/wwdc2017/710/
简单的说就是把NN的算法hardcode到A11里面去了
开发者可以不用懂ML的细节 把ML当黑盒子用即可