Update README.md

README.md

@@ -10,19 +10,19 @@ espresso数据萃取机
 https://zhuanlan.zhihu.com/c_1018534554512035840
 
 
-##目前的课程(请点击, 指向对应目录和视频链接):   
+## 目前的课程(请点击, 指向对应目录和视频链接):   
 
 |  |   
 | :------------------------------------------------------------------------- |   
 | [图解极大似然估计推导与3D可视化](https://github.com/aespresso/a_journey_into_math_of_ml/tree/master/00_maximum_likelihood_estimationa_and_3d_visualization) |  
-| [B站讲解](https://www.bilibili.com/video/av54346038/) [youtube](https://www.youtube.com/watch?v=C6a-SMY0H50)|
+| [B站讲解](https://www.bilibili.com/video/av54346038/) / [youtube](https://www.youtube.com/watch?v=C6a-SMY0H50)|
 | [逻辑回归(一)-logit-odds-sigmoid函数-最大似然估计](https://github.com/aespresso/a_journey_into_math_of_ml/tree/master/01_logistic_regression) |
-| [B站讲解](https://www.bilibili.com/video/av53400966/) [youtube](https://www.youtube.com/watch?v=i3zz7DQU3tc&t=535s) |
+| [B站讲解](https://www.bilibili.com/video/av53400966/) / [youtube](https://www.youtube.com/watch?v=i3zz7DQU3tc&t=535s) |
 | [逻辑回归(二)-交叉熵与困惑度](https://github.com/aespresso/a_journey_into_math_of_ml/tree/master/01_logistic_regression) |
-| [B站讲解](https://www.bilibili.com/video/av53704693/) [youtube](https://www.youtube.com/watch?v=bkC1Lna4lBY&t=16s) |
+| [B站讲解](https://www.bilibili.com/video/av53704693/) / [youtube](https://www.youtube.com/watch?v=bkC1Lna4lBY&t=16s) |
 | [逻辑回归(三)-梯度下降-偏导数-求导最小化-分类边界可视化](https://github.com/aespresso/a_journey_into_math_of_ml/tree/master/01_logistic_regression) |   
-| [B站讲解](https://www.bilibili.com/video/av54780873/) [youtube](https://www.youtube.com/watch?v=up85PnWFBY8&t=9s) |
+| [B站讲解](https://www.bilibili.com/video/av54780873/) / [youtube](https://www.youtube.com/watch?v=up85PnWFBY8&t=9s) |
 | [机器学习之数学之旅-从零推导adaboost与3D可视化-特征选择-集体智能-集成学习-boosting](https://github.com/aespresso/a_journey_into_math_of_ml/tree/master/02_adaboost) |    
-| [B站讲解](https://www.bilibili.com/video/av56033745/) [youtube](https://www.youtube.com/watch?v=-rqGPD06Ifs&t=5s) |
+| [B站讲解](https://www.bilibili.com/video/av56033745/) / [youtube](https://www.youtube.com/watch?v=-rqGPD06Ifs&t=5s) |
 | [汉语自然语言处理-从零解读碾压循环神经网络的transformer模型(一)](https://github.com/aespresso/a_journey_into_math_of_ml/tree/master/03_transformer_tutorial_1st_part) |   
-| [B站讲解](https://www.bilibili.com/video/av58239477/) [youtube](https://www.youtube.com/watch?v=wLKsaZWeuCM) |
+| [B站讲解](https://www.bilibili.com/video/av58239477/) / [youtube](https://www.youtube.com/watch?v=wLKsaZWeuCM) |