From a8e7f508a83bbccdeeadfbb320991f47bf44e7a5 Mon Sep 17 00:00:00 2001
From: Eureka1024 <1072348750@qq.com>
Date: Fri, 30 Apr 2021 17:05:54 +0800
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---
 .../rt-thread-standard/tutorial/beep-player/pin.md              | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md b/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
index 62c1b03..446d54f 100644
--- a/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
+++ b/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
@@ -110,7 +110,7 @@ int led_on(void)
 int led_off(void);            //LED 灯灭
 ```
 
-假设 LED 高电平灭，调用 API 输出低电平，使 LED 熄灭。
+假设 LED 高电平灭，调用 API 输出高电平，使 LED 熄灭。
 
 ```c
 int led_off(void)
-- 
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