Minor changes on builtin_service.md

docs/en/builtin_service.md

 # About Builtin Services
 
-Builtin services expose internal status of servers, making development and debugging more efficient over brpc. brpc provides builting services via `HTTP`,  which can be easily accessed through curl and browsers.  Servers respond *plain text* or *html* according to `User-Agent` in the request header, or you can append `?console=1` to the *uri* which forces servers to respond *plain text*. Here's an [example](http://brpc.baidu.com:8765/) running on our machine, check it out for more information about the builtin services. If the listen port is filtered(e.g. only ports in *8000-8999* can be accessed outside data centers), you can run [rpc_view](rpc_view.md) to launch a proxy or run curl \<SERVER-URL\> inside data centers.
+Builtin services expose internal status of servers, making development and debugging more efficient over brpc. brpc serves builting services via `HTTP`,  which can be easily accessed through curl and browsers.  Servers respond *plain text* or *html* according to `User-Agent` in the request header, or you can append `?console=1` to the *uri* which forces servers to respond *plain text*. Here's an [example](http://brpc.baidu.com:8765/) running on our machine, check it out for more information about the builtin services. If the listen port is filtered(e.g. only ports in *8000-8999* can be accessed outside data centers), you can run [rpc_view](rpc_view.md) to launch a proxy or run curl \<SERVER-URL\> inside data centers.
 
-Accessed through browsers： 
+Accessed through browsers:
 
 ![img](../images/builtin_service_more.png)
 
- Accessed through terminal：
+ Accessed through terminal:
 
- ![img](../images/builtin_service_from_console.png) 
+ ![img](../images/builtin_service_from_console.png)
 
 # Safe Mode
 
-To stay safe from attack, you **must** disable builtin services in the servers on public network, including the ones with proxies(nginx or other http servers). Click [here](server.md#安全模式) for more details。
+To stay safe from attack, you **must** disable builtin services in the servers on public network, including the ones with proxies(nginx or other http servers). Click [here](server.md#安全模式) for more details.
 
-# Main services
+# Main services:
 
 [status](status.md)
 
@@ -36,11 +36,11 @@ To stay safe from attack, you **must** disable builtin services in the servers o
 
 
 
-[version service](http://brpc.baidu.com:8765/version) shows the version of the server。Invoke Server::set_version() to specify your server，or brpc would generate a default version ，rule：`brpc_server_<service-name1>_<service-name2> ...`
+[version service](http://brpc.baidu.com:8765/version) shows the version of the server。Invoke Server::set_version() to specify version of your server, or brpc would generate a default version in like `brpc_server_<service-name1>_<service-name2> ...`
 
 ![img](../images/version_service.png)
 
-[health service](http://brpc.baidu.com:8765/health) shows whether this server is alive or note。
+[health service](http://brpc.baidu.com:8765/health) shows whether this server is alive or not.
 
 ![img](../images/health_service.png)
 
@@ -48,7 +48,7 @@ To stay safe from attack, you **must** disable builtin services in the servers o
 
 ![img](../images/protobufs_service.png)
 
-[vlog service](http://brpc.baidu.com:8765/vlog) shows all the [VLOG](streaming_log.md#VLOG) that can be enable(not work with glog)。
+[vlog service](http://brpc.baidu.com:8765/vlog) shows all the [VLOG](streaming_log.md#VLOG) that can be enable(not work with glog).
 
 ![img](../images/vlog_service.png)