diff --git a/readme.md b/readme.md
index 9a7e047..09e6d4a 100644
--- a/readme.md
+++ b/readme.md
@@ -1,5 +1,7 @@
+
+
 ## Introduction
-This is an implementation Content Defined Chunking based on [Rabin Footprint ](http://www.cs.cmu.edu/~hakim/software/).It is extracted from the source code of [seafile](https://github.com/haiwen/seafile) project.
+This is an implementation of Content Defined Chunking based on [Rabin Footprint](http://www.cs.cmu.edu/~hakim/software/). It is extracted from the source code of [seafile](https://github.com/haiwen/seafile) project.
 
 You can build this project by running `make`.
 
@@ -8,11 +10,11 @@ You can build this project by running `make`.
 
 ![cdc](http://baixiangcpp.oss-cn-shanghai.aliyuncs.com/github/cdc.gif)
 
-## Set  min block size and max block size
+## Set min block size and max block size
 
 ```
 #define CDC_MIN_BLOCK_SIZE (6 * (1 << 20))     /* 6MB */
 #define CDC_MAX_BLOCK_SIZE (10 * (1 << 20))    /* 10MB */
 ```
 
-If you need the block to be larger or smaller,just change these macros in `cdc.c` to the value you need.
+If you need the block to be larger or smaller, just change these macros in `cdc.c` to the value you need.