From a84ed900d8f263fa734d6d5636824547656e5616 Mon Sep 17 00:00:00 2001
From: lingkerio whiher <112792583+lingkerio@users.noreply.github.com>
Date: Sun, 7 May 2023 13:15:27 +0800
Subject: [PATCH 1/2] Update 02-usability.md

---
 book/zh-cn/02-usability.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/book/zh-cn/02-usability.md b/book/zh-cn/02-usability.md
index d7193dd4..ed4fe982 100644
--- a/book/zh-cn/02-usability.md
+++ b/book/zh-cn/02-usability.md
@@ -880,7 +880,7 @@ C++11 引入了 `override` 和 `final` 这两个关键字来防止上述情形
 
 #### override
 
-当重载虚函数时，引入 `override` 关键字将显式的告知编译器进行重载，编译器将检查基函数是否存在这样的虚函数，否则将无法通过编译：
+当重载虚函数时，引入 `override` 关键字将显式的告知编译器进行重载，编译器将检查基函数是否存在这样的其函数签名一致的虚函数，否则将无法通过编译：
 
 ```cpp
 struct Base {

From e031ac0295460dfa72cf45db26256b6d785565ed Mon Sep 17 00:00:00 2001
From: lingkerio whiher <112792583+lingkerio@users.noreply.github.com>
Date: Sun, 7 May 2023 13:18:24 +0800
Subject: [PATCH 2/2] Update 02-usability.md

---
 book/en-us/02-usability.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/book/en-us/02-usability.md b/book/en-us/02-usability.md
index 3528c68a..6da7d8e5 100644
--- a/book/en-us/02-usability.md
+++ b/book/en-us/02-usability.md
@@ -971,7 +971,7 @@ C++11 introduces the two keywords `override` and `final` to prevent this from ha
 
 ### override
 
-When overriding a virtual function, introducing the `override` keyword will explicitly tell the compiler to overload, and the compiler will check if the base function has such a virtual function, otherwise it will not compile:
+When overriding a virtual function, introducing the `override` keyword will explicitly tell the compiler to overload, and the compiler will check if the base function has such a virtual function with consistent function signature, otherwise it will not compile:
 
 ```cpp
 struct Base {