diff --git a/src/basic/trait/advance-trait.md b/src/basic/trait/advance-trait.md
index d4ff17a2..64e85a99 100644
--- a/src/basic/trait/advance-trait.md
+++ b/src/basic/trait/advance-trait.md
@@ -82,7 +82,6 @@ trait Container{
 fn difference<C: Container>(container: &C) {}
 ```
 **关联类型可以增加其他特征限制**
-例如：限定类型必须实现了core::fmt::Display trait:
 ```rust
 trait Container{
     type A：Display;