对象会被重新放置，以适合这个新的坐标系统。
The objects are repositioned to fit into the new coordinate system.
最后，使用该点来在地图的相应坐标上放置标记。
Finally, you use that point to place a marker on the map at the corresponding coordinates.
区别在于使用鼠标来选择并放置控件要比输入它们的名字和坐标更加容易。
The difference is that it is much easier to select widgets and position them with a mouse than it is to type out their names and then type in their coordinates.
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