From 87660194e73534ebc049699d380d282a941dc254 Mon Sep 17 00:00:00 2001
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Date: Sat, 6 Jul 2019 11:05:08 +0800
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---
 docs/book/22-Enumerations.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/docs/book/22-Enumerations.md b/docs/book/22-Enumerations.md
index 1456550..1ef7d2d 100644
--- a/docs/book/22-Enumerations.md
+++ b/docs/book/22-Enumerations.md
@@ -3,12 +3,16 @@
 <!-- Enumerations -->
 # 第二十二章 枚举
 
+> 关键字enum可以将一组具名的值的有限集合创建为一种新的类型，而这些具名的值可以作为常规的程序组件使用。这是一种非常有用的功能
+
+
 
 <!-- Basic enum Features -->
+
 ## 基本功能
 
-
 <!-- Adding Methods to an enum -->
+
 ## 方法添加