中文说明：bp神经网络算法用来秒速人脸特征数据的训练，最后可以对人脸的偏向做出预测，或者说是做出一个分类。bp神经网络算法用来秒速人脸特征数据的训练，最后可以对人脸的偏向做出预测，或者说是做出一个分类。
English Description：
BP neural network algorithm is used to train face feature data in seconds. Finally, it can predict the bias of face, or make a classification. BP neural network algorithm is used to train face feature data in seconds. Finally, it can predict the bias of face, or make a classification.