diff --git a/other/download.md b/other/download.md
index b5273c98..4c52b0b8 100644
--- a/other/download.md
+++ b/other/download.md
@@ -41,5 +41,5 @@
 
 # 科普
 
-<a href="https://pan.baidu.com/s/1fKo7ntvQUettvjaTQqyCEw"> <img src="s1113106.jpg" width="130"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1dNFZcBdDhA80-pWT1qcQSg"> <img src="s9114855.jpg" width="130"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1s0vhcWxN_36PpZeJoOHrKA"> <img src="s4669554.jpg" width="130"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1fII84UPuo8aIxDkOakvUVg"> <img src="s4379914.jpg" width="130"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1XarJowXrxoBtKdmVCGcm1w"> <img src="s4687321.jpg" width="130"/> </a> 
+<a href="https://pan.baidu.com/s/1fKo7ntvQUettvjaTQqyCEw"> <img src="s1113106.jpg" width="130"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1dNFZcBdDhA80-pWT1qcQSg"> <img src="s9114855.jpg" width="130"/> </a> &nbsp;&nbsp;  &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1fII84UPuo8aIxDkOakvUVg"> <img src="s4379914.jpg" width="130"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1XarJowXrxoBtKdmVCGcm1w"> <img src="s4687321.jpg" width="130"/> </a>