diff --git a/08 类.playground/Resources/README.md b/08 类.playground/Resources/README.md
index 87beb32..a57d3dd 100644
--- a/08 类.playground/Resources/README.md	
+++ b/08 类.playground/Resources/README.md	
@@ -133,8 +133,8 @@ s1 = Size(width: 11, height: 22)
 
 ```swift
 class Point	{  var x = 11
-var test = true
-var y = 22
+  var test = true
+  var y = 22
 }
 var p = Point()  class_getInstanceSize(type(of: p)) // 40  
 class_getInstanceSize(Point.self) // 40