左上角的缩放控件能够改变地图的比例。
The zoom controls in the upper left hand corner change the scale of the map.
通过左键单击、拖动鼠标动作可以移动地图，通过地图左上角的缩放控件能够改变地图的比例。
The map can be moved with a left-click, drag mouse action, and the scale can be changed with the zoom control in the upper left corner of the map.
通过左键单击、拖动鼠标动作可以移动地图，通过地图左上角的缩放控件能够改变地图的比例。
The map can be moved with a left-click, drag mouse action, and the scale can be changed with the zoom control in the upper left corner of the map.
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