But if the pool of available discrete items is too large to fit in a single view and some of it must be scrolled offscreen, the selection idiom immediately becomes unwieldy.

• 但如果可用的离散项目集合太大，不适合在单个视图中显示。 而且其中的一些项目必须滚动才能看见时，选择习惯用法立刻就不适用了，这是列表控件问题中常见的情况。