参考链接:https://zhuanlan.zhihu.com/p/47063917
https://medium.com/syncedreview/a-brief-overview-of-attention-mechanism-13c578ba9129
https://blog.youkuaiyun.com/hahajinbu/article/details/81940355
回顾RNN,

要设置max_len , 选择多少个值作为输入。
Encoder-Decoder结构



之前的Neural Machine Translati