diff --git a/listings/ch20-advanced-features/listing-20-12/src/main.rs b/listings/ch20-advanced-features/listing-20-12/src/main.rs
index 2301b0c..3c7abbe 100644
--- a/listings/ch20-advanced-features/listing-20-12/src/main.rs
+++ b/listings/ch20-advanced-features/listing-20-12/src/main.rs
@@ -1,10 +1,10 @@
 // ANCHOR: here
 unsafe trait Foo {
-    // methods go here
+    // 方法在这里
 }
 
 unsafe impl Foo for i32 {
-    // method implementations go here
+    // 方法实现在这里
 }
 // ANCHOR_END: here