update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/application-dev/reference/native-lib/third_party_libuv/libuv.md

@@ -6,13 +6,16 @@
 
 
 
-libuv is a cross-platform library that implements asynchronous I/O based on event loops. It is mainly used in Node.js.
+[libuv](http://libuv.org/) is a cross-platform library that implements asynchronous I/O based on event loops. It is used in **Node.js**.
 
 ## Supported Capabilities
 
 
 
-libuv implements cross-platform asynchronous I/O based on event loops.
+Implements cross-platform asynchronous I/O based on event loops.
 
-It supports standard lib interfaces.
+Supports standard lib interfaces.
 
+## API List
+
+[API documentation](http://docs.libuv.org/en/v1.x/api.html)