diff --git a/README.md b/README.md
index e7b702f..e087fbc 100644
--- a/README.md
+++ b/README.md
@@ -45,11 +45,11 @@ Usage: /bin/le webroot a.com [www.a.com,b.com,c.com]  [key-length] [cert-file-pa
 ```
 le issue   /home/wwwroot/aa.com    aa.com    www.aa.com,cp.aa.com
 ```
-First argument " /home/wwwroot/aa.com" is the web root folder
+First argument `/home/wwwroot/aa.com` is the web root folder, You must have `write` access to this folder.
 
 Second argument "aa.com" is the main domain you want to issue cert for.
 
-Third argument is the additional domain list you want to use.  Comma separated list,  It's Optional.
+Third argument is the additional domain list you want to use.  Comma separated list,  which is Optional.
 
 You must point and bind all the domains to the same webroot dir:`/home/wwwroot/aa.com`
 
@@ -63,8 +63,8 @@ The issued cert will be renewed every 50 days automatically.
 ```
 le issue   /home/wwwroot/aa.com    aa.com    www.aa.com,cp.aa.com  2048  /path/to/certfile/in/apache/nginx  /path/to/keyfile/in/apache/nginx   "service apache2/nginx reload"
 ```
-This can link the issued cert to the production apache or nginx path.
-Once the cert is renewed,  the apache/nginx will be automatically reloaded by the command: ` service apache2 reload` or `service nginx reload`
+Which issues the cert and then links it to the production apache or nginx path.
+The cert will be renewed every 50 days by default (which is configurable), Once the cert is renewed, the apache/nginx will be automatically reloaded by the command: ` service apache2 reload` or `service nginx reload`