Update README.md

README.md

@@ -31,13 +31,13 @@ Having new ideas? We also provide the source code and the document of the projec
 The runnable .jar file which can be executed by double click under java environment and the compressed files which can be runned without java environment under different operating systems. 
 
 #####/src/:
-The source code of the client and the server. The folder /src/data_collection/ contains the perl source code for database data collecting. The folder /src/data_center/ contains the source code that provides database and server connection and backstage data storing. The folder /src/EasyBbk_Swing/gui/ contains the source code for GUI.  (Note that the server detail like username and password is not provided for information safety). 
+The source code of the client and the server. The folder /src/data_collection/ contains the perl source code for database data collecting. The folder /src/data_center/ contains the source code that provides database and server connection and background data storing. The folder /src/EasyBbk_Swing/gui/ contains the source code for GUI.  (Note that the server detail like username and password is not provided for information safety). 
 
 #####/lib/:
 The linked .jar file essential to the client. You may also link these resources into the software when further modifying. 
 
 #####/Documentation/:
-The documentation for data collection, API documentation and test documentation for the backstage unit "data_center". 
+The documentation for data collection, API documentation and test documentation for the background unit "data_center". 
 
 
 ####API Documents and Architecture Introductions: