diff --git a/docs/tutorial/syntax-uts.md b/docs/tutorial/syntax-uts.md
index 1d25d453601cc3e999fb9beebdd181da7aae6123..4d8da1b39a224e2ea821f3bbb50be42e7283ffbc 100644
--- a/docs/tutorial/syntax-uts.md
+++ b/docs/tutorial/syntax-uts.md
@@ -1922,6 +1922,7 @@ foo.split(' ');
 举例：
 
 ```js
+// js 求和两个数字
 function add(left, right) {
     return left + right;
 }
@@ -1930,6 +1931,7 @@ function add(left, right) {
 补充类型批注后，即可变成 uts 代码
 
 ```ts
+// uts 求和
 function add(left: number, right: number): number {
     return left + right;
 }