change some description

docs/en/base/iiot_dual_switch_kit_with_core.md

@@ -2,12 +2,12 @@
 
 <img src="assets\img\product_pics\base\iiot_dual_switch kit_with_core\iiot_dual_switch kit_with_core_01.jpg" width="30%" height="30%"> <img src="assets\img\product_pics\base\iiot_dual_switch kit_with_core\iiot_dual_switch kit_with_core_02.jpg" width="30%" height="30%">
 
-## 描述
+
+## Description
 
 **IIoT Dual-Switch Kit with core** is a  functional-orientated module specifically built around BASE26.  Mainly implemented a dual-relay control. As is known that  BASE26 is created for industrial purpose, where may have plenty of relay-controlled application scenarios, add up the highly-customized features of BASE26, makes it a powerful and full-function node for IIoT. 
 
-
-## Description
+## Product Feature
 
 - Two relays inside 
 - Relay allows on/off current/voltage:

docs/en/base/node_base.md

@@ -19,7 +19,7 @@ ESP-ADF supports development of audio applications for the Espressif Systems ESP
 Internet Radio
 - Voice recognition and integration with online services such as Alexa, DuerOS, and more.
 
-##Product Feature
+## Product Feature
 
 * 1x 12 RGBs
 * 1x temperature & humidity sensor(DHT12),which can display its own status and perception surrounding environment.