diff --git a/src/generic_types_traits_and_lifetimes/lifetimes.md b/src/generic_types_traits_and_lifetimes/lifetimes.md
index 677077a..2eb28a5 100644
--- a/src/generic_types_traits_and_lifetimes/lifetimes.md
+++ b/src/generic_types_traits_and_lifetimes/lifetimes.md
@@ -511,7 +511,7 @@ fn longest_with_an_announcement<'a, T>(
 where
     T: Display,
 {
-    println! ("通知！{}", ann);
+    println! ("通知！{ann}");
     if x.len() > y.len() { x } else { y }
 }
 ```