diff --git a/README.md b/README.md
index eabe3f0..41119df 100644
--- a/README.md
+++ b/README.md
@@ -1280,11 +1280,12 @@ int main(){
 
 		var num2 float32 = 3.14
 		// 不能将其它基本类型强制转换为字符串类型
+		// Cannot convert an expression of the type 'float32' to the type 'string'
 		var str2 string = string(num2)
 		fmt.Println(str2)
 
 		var str3 string = "97"
-		// 不能强制转换, cannot convert str2 (type string) to type int
+		// 不能强制转换, cannot convert str3 (type string) to type int
 		var num3  int = int(str3)
 		fmt.Println(num3)
 	}