And just as their long, heavy trains pose a burden to peacocks, the extravagant feathers of Anchiornis may have been a bit of a drag, literally.
对于雄孔雀来说，硕长且沉重的尾屏是个沉重的负担，而过多的羽毛可能也同样拖累了近鸟龙。
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Not only do they save a bit of development time, but they also provide a consistent approach that works well in the presence of other handlers-even other click-and-drag handlers.
This section contains a lot of small functions, each of which takes care of a bit of the annoying boilerplate that usually comes with implementing drag-and-drop functions.