中文说明：
长短期记忆神经网络，是一种时间循环神经网络，是为了解决一般的RNN（循环神经网络）存在的长期依赖问题而专门设计出来的，所有的RNN都具有一种重复神经网络模块的链式形式。在标准RNN中，这个重复的结构模块只有一个非常简单的结构，例如一个tanh层。
English Description：
The long-term and short-term memory neural network is a kind of time recurrent neural network, which is specially designed to solve the long-term dependence problem of general RNN (recurrent neural network). All RNNs have a chain form of repetitive neural network modules. In standard RNN, this repeated structure module has only a very simple structure, such as a tanh layer.