This block of code defines a GEvent.addListener which listens for any map movement (drag, drop, zoom, pan, map type change) and defines the appropriate action to take should it occur.
这段代码定义一个GEvent.addListener ，它监听所有地图运动（拖、放、缩放、摇移、地图类型切换）并定义相应的操作。
This system uses the head movement controlled camera pan and tilt to replace pan and tilt's manual operation, and so enhance the efficiency of the remote control operation.
该监视系统采用头部运动来控制摄像机云台，替代传统监视系统中用手动操作来控制摄像机云台的方法，有效地提高了遥控操作的效率。
This system uses the head movement controlled camera pan and tilt to replace pan and tilt's manual operation, and so enhance the efficiency of the remote control operation.
该监视系统采用头部运动来控制摄像机云台，替代传统监视系统中用手动操作来控制摄像机云台的方法，有效地提高了遥控操作的效率。
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