在联系人应用程序使用了新的双栏用户界面并支持快速滚动，使得使用者可以轻松地组织和查找联系人。
The contacts app USES a new two-pane UI and Fast Scroll to let users easily organize and locate contacts.
长时间观看高清电视或快速滚动手机屏幕也可能以某种方式改变人们的平衡感，使他们更容易绊倒和摔跤。
Lengthy viewing of high-definition televisions or scrolling wildly on a phone might also somehow alter people's sense of equilibrium, making them more likely to trip and fall.
当它意识到快速滚动让世界与从前大不相同时，它停了下来，把找到的那一块儿放在路边，又开始慢慢地滚动。
When it realized how different the world seemed when it rolled so quickly, it stopped, left its found piece by the side of the road and rolled slowly away.
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