3岁左右的孩子能拿起一台iPhone，娴熟地滚动菜单，但有多少7岁大的孩子能组织一场与邻家孩子的足球赛？
The average 3-year-old can pick up an iPhone and expertly scroll through the menu of apps, but how many 7-year-olds can organize a kickball game with the neighborhood kids?
如果屏幕缓冲区比控制台窗口大，控制台会自动显示滚动条，以使控制台窗口可以在屏幕缓冲区上重新定位。
If the screen buffer is larger than the console window, the console automatically displays scroll bars so the console window can be repositioned over the screen buffer area.
滚动振动试验台在测试机车车辆动力学性能时，轨道轮与实际线路的差异会造成测试结果出现偏差。
In testing the dynamics performance of locomotives and rolling stock on the roller testing rig, the difference between the track wheel and the actual track may cause deviation of the test results.
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