当松开鼠标按钮时，被拖动的元素和拖放到的目标元素就会互换位置，而且所有透明矩形也会消失，直到下一次切换。
When you release the mouse button, the dragged element and the drag target switch places, and all translucent rectangles disappear until the next swap.
耐克的专利里说：”自动系鞋带系统有一副可以自动打开关闭的带子，在松开和系紧的地方改变位置。
To quote the patent filing: “The automatic lacing system provides a set of straps that can be automatically opened and closed to switch between a loosened and tightened position.
我看着老人剪断手中的风筝线，松开风筝。比利那“飞翔的梦想”再次飞了起来，轻轻地落在一棵光秃的树的梢头，那是它的新位置。
I watched how the old man cut the string, releasing the kite, as Billy's dream-on-wings 26 snapped back, settling gently into its new position high atop the 27 barren tree.
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