External keyboards. A keyboard that slopes away from you provides the best Angle for your hands and wrists.
外接键盘。如果键盘能朝远离你的方向倾斜一个角度，你的手、腕就可以处于最佳角度。
Several commercial products are available that offer external keyboards and even projection of virtual keyboards onto any flat surface.
现在有几个商业产品提供了外置键盘，甚至是虚拟键盘投影仪，可以投射到任意平坦的界面上。
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