Update readme file to femto mega and femto bolt.

README.MD

@@ -357,7 +357,9 @@ ros2 run orbbec_camera list_depth_work_mode_node
 ```
 
 ## Configuration of depth NFOV and WFOV modes
-For Femto Mega and Femto Bolt devices, the depth NFOV and WFOV modes are achieved by configuring different resolutions in the depth startup parameters.The depth startup parameters depth_width and depth_height specify the resolution of the depth stream, the frame fps and resolution of the IR need to be consistent with the depth. The corresponding resolutions for different modes are as follows:
+For the Femto Mega and Femto Bolt devices, the NFOV and WFOV modes are implemented by configuring the resolution of Depth and IR in the launch file. 
+In launch file, depth_width、depth_height、ir_width、ir_height represents the resolution of the depth  and the resolution of the IR.
+The frame fps and resolution of IR must be consistent with the depth. The correspondence between different modes and resolutions is as follows:
 - NFOV unbinned: 640 x 576.
 - NFOV binned: 320 x 288.
 - WFOV unbinned: 1024 x 1024.

README_CN.MD

@@ -344,7 +344,9 @@ ros2 run orbbec_camera list_depth_work_mode_node
 ```
 
 ## 深度NFOV和WFOV模式配置
-对于Femto Mega和Femto Bolt设备，深度NFOV和WFOV模式需要通过配置深度启动参数不同分辨率实现,深度启动参数`depth_width`, `depth_height`为深度流的分辨率，IR的分辨率和帧率必须和深度保持一致。不同模式和分辨率对应关系：
+对于Femto Mega和Femto Bolt设备，深度NFOV和WFOV模式通过在launch文件中配置Depth和IR的分辨率实现。
+在launch文件中，`depth_width`, `depth_height`、'ir_width'、‘ir_height’为深度流的分辨率和IR流的分辨率。
+IR的分辨率和帧率必须和深度保持一致。不同模式和分辨率对应关系如下:
 - NFoV unbinned：640 x 576。
 - NFoV binned：320 x 288。
 - WFoV unbinned：1024 x1024。