diff --git a/mycobot_280/launch/mycobot_follow.launch b/mycobot_280/launch/mycobot_follow.launch
index e656fc0..4e3f526 100644
--- a/mycobot_280/launch/mycobot_follow.launch
+++ b/mycobot_280/launch/mycobot_follow.launch
@@ -1,4 +1,5 @@
 <launch>
+	<!-- Load URDF file,加载URDF文件 -->
 	<arg name="model" default="$(find mycobot_description)/urdf/mycobot/mycobot_urdf.urdf"/>
 	<arg name="rvizconfig" default="$(find mycobot_280)/config/mycobot.rviz" />
 
diff --git a/mycobot_280jn/launch/slider_control.launch b/mycobot_280jn/launch/slider_control.launch
index c009e09..ac42e42 100644
--- a/mycobot_280jn/launch/slider_control.launch
+++ b/mycobot_280jn/launch/slider_control.launch
@@ -8,7 +8,7 @@
 
 	<param name="robot_description" command="$(find xacro)/xacro --inorder $(arg model)" />
 
-	<!-- Combinejoin values to TF ，将值合并到TF-->
+	<!-- Combinejoin values to TF. 将值合并到TF-->
 	<node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher" />
 	<node name="joint_state_publisher_gui" pkg="joint_state_publisher_gui" type="joint_state_publisher_gui"> 
 		<!-- <param name="use_gui" value="$(arg gui)" />	 -->
@@ -19,6 +19,6 @@
 		<param name="port" type="string" value="$(arg port)" />
 		<param name="baud" type="int" value="$(arg baud)" />
 	</node> -->
-	<!-- Show in Rviz ，显示在Rviz-->
+	<!-- Show in Rviz .显示在Rviz-->
 	<node name="rviz" pkg="rviz" type="rviz" args="-d $(arg rvizconfig)" required="true" />
 </launch>