If an interactive computer screen is to match a whiteboard in usefulness, it must be viewable from arm's length as well as from across a room.
如果一个交互式计算机屏幕要在实用性上与白板相匹配，它必须在手臂长度范围和横跨房间范围内是可视的。
When the computer was just a screen, keyboard and mouse, it remained, for all its usefulness, a tool. A means to an end.
在电脑只是显示屏、键盘和鼠标的时候，虽然非常有用，但只是一个工具。
Objective: to document the surgical technique and usefulness of computer-assisted surgery for spinal osteotomy.
目的：记录此外科技术和计算机辅助下行脊柱截骨术的有效性。
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