enhance translation

site/src/site/sphinx/en/redefine.md

@@ -1,21 +1,18 @@
 redefine
 ========
 
-Load the external `*.class` files to **re-define** the JVM-loaded classes.
+> Load the external `*.class` files to re-define the loaded peer class in JVM.
 
 Reference: [Instrumentation#redefineClasses](https://docs.oracle.com/javase/8/docs/api/java/lang/instrument/Instrumentation.html#redefineClasses-java.lang.instrument.ClassDefinition...-)
 
-F.Y.I
-
-1. Re-defined classes cannot be restores any more;
-2. Re-definition can fail (like adding a new field/method); for more information, please refer to JDK documentation
+> Notes: Re-defined classes cannot be restored. There are chances that redefining may fail due to some reasons, for example: there's new field introduced in the new version of the class, pls. refer to JDK's documentation for the limitations.
 
 ### Options
 
 |Name|Specification|
 |---:|:---|
-|[c:]|hashcode of the class loader|
-|[p:]|absolute path of the external `*.class` (multiple paths supported)|
+|`[c:]`|hashcode of the class loader|
+|`[p:]`|absolute path of the external `*.class`, multiple paths are separated with 'space'|
 
 
 ### Usage