diff --git a/public/docs/ts/latest/cookbook/dependency-injection.jade b/public/docs/ts/latest/cookbook/dependency-injection.jade
index 6b5baf03c9..7486d12381 100644
--- a/public/docs/ts/latest/cookbook/dependency-injection.jade
+++ b/public/docs/ts/latest/cookbook/dependency-injection.jade
@@ -1484,6 +1484,8 @@ a(id="forwardref")
   Angular的`forwardRef`函数建立一个*间接地*引用，Angular可以随后解析。
 
   The *Parent Finder* sample is full of circular class references that are impossible to break.
+
+  *Parent Finder*是一个充满了无法解决的循环引用的例子
   
 :marked
   We face this dilemma when a class makes *a reference to itself*