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。

youdao

Elbows should be at a 90-degree Angle. Again, a keyboard tray can work wonders here.

肘部应保持90度的角度，同样的，一个键盘托盘可能会非常有用。

youdao

When you work at a computer, the keyboard should be at elbow height, so your upper and lower arms form an Angle of 90 degrees or more and your forearms are supported by armrests.

当你在电脑前工作时，键盘应该和肘部齐高，这样你的大臂与小臂成90度角或更大的角度，小臂可以放在椅子扶手上。

youdao

We'd also caution you that when the tablet is docked inside the keyboard the weight distribution becomes lopsided -- so much so that unless you angle the display just so the whole thing might tumble backward off your lap.

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The angle of the screen is also fixed, since the case relies on a notch above the keyboard (like many Nexus 7 cases) to keep the tablet stationary.

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