diff --git a/expanding-cards/script.js b/expanding-cards/script.js
index 68d6b5c..51fffab 100644
--- a/expanding-cards/script.js
+++ b/expanding-cards/script.js
@@ -1,5 +1,7 @@
+// 获取所有类选择器panel选中的元素
 const panels = document.querySelectorAll('.panel')
 
+// 为每个panel元素注册事件监听器——在触发点击事件时，移除所有panel的active类属性，并为当前panel添加active类属性
 panels.forEach(panel => {
     panel.addEventListener('click', () => {
         removeActiveClasses()