diff --git a/course/basic/define-variable.md b/course/basic/define-variable.md
index 61921e11..b395290d 100644
--- a/course/basic/define-variable.md
+++ b/course/basic/define-variable.md
@@ -107,11 +107,6 @@ PS:说实话，我认为这个设计并不太好。
 
 ## 解构赋值（Destructuring Assignment）
 
-解构赋值是 0.12 新引入的语法，允许对可索引的聚合结构（如元组、向量和数组）进行解构。
+解构赋值是 `0.12` 新引入的语法，允许对可索引的聚合结构（如元组、向量和数组）进行解构。
 
-```zig
-var z: u32 = undefined;
-const x, var y, z = [3]u32{ 1, 2, 3 };
-y += 10;
-// x 是 1，y 是 2，z 是 3
-```
+<<<@/code/release/define_variable.zig#deconstruct
diff --git a/course/code/12/define_variable.zig b/course/code/12/define_variable.zig
index 71aebadb..a8cbe2cf 100644
--- a/course/code/12/define_variable.zig
+++ b/course/code/12/define_variable.zig
@@ -133,3 +133,16 @@ const Block = struct {
         _ = x;
     }
 };
+
+const Deconstruct = struct {
+    fn main() void {
+        // #region deconstruct
+        var z: u32 = undefined;
+        // var z: u32 = undefined;
+        const x, var y, z = [3]u32{ 1, 2, 3 };
+        y += 10;
+        // x 是 1，y 是 2，z 是 3
+        // #endregion deconstruct
+        _ = x;
+    }
+};
diff --git a/course/code/14/define_variable.zig b/course/code/14/define_variable.zig
index 71aebadb..a8cbe2cf 100644
--- a/course/code/14/define_variable.zig
+++ b/course/code/14/define_variable.zig
@@ -133,3 +133,16 @@ const Block = struct {
         _ = x;
     }
 };
+
+const Deconstruct = struct {
+    fn main() void {
+        // #region deconstruct
+        var z: u32 = undefined;
+        // var z: u32 = undefined;
+        const x, var y, z = [3]u32{ 1, 2, 3 };
+        y += 10;
+        // x 是 1，y 是 2，z 是 3
+        // #endregion deconstruct
+        _ = x;
+    }
+};