The most standard practice is to require people to flat head, flat shoulder, flat Angle of the composition of milk corners, select the location of the middle of the best visual position.

现在最标准的做法是要求人们将平目、平肩、平乳的角度组成四角，选正中的位置为最佳目视部位。

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If your foot is at a right Angle to your outstretched leg and does not dangle, you have a low ankle-joint axis and will be more comfortable in flat shoes than in high heels.

如果你的脚和你伸直的腿成直角，且没有晃荡，那么说明你有一个较低的踝关节，你穿平底鞋会比穿高跟鞋更舒适。

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The Angle of the black steel roof follows the Windows, gradually changing from flat to a peak at the corner.

黑色钢屋顶的角度跟随窗户的角度，从平面逐渐到达拐角处的顶端。

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The 21.5-inch, 250-nit, 1080p panel makes use of VA technology (like some other Acer monitors, actually), which provides viewing angles on par with IPS. Which is to say, they're wide, and colors stay vibrant regardless of whether you're standing off to the side or you've got the screen pushed down at a near-flat angle.

ENGADGET

The 610 has a mechanism that allows you to slide it down so that the display is lying almost face-up and at an almost-flat 60-degree angle, a position HP is dubbing Recline Mode.

ENGADGET: HP TouchSmart 610 review

During the second quarter, Lenovo announced its new IdeaCentre A520, a new all-in-one desktop PC featuring a compact 23-inch frameless 1080p display that supports multi-touch with a widely adjustable screen angle (from -5 to 90 degress flat) with perfect picture at any angle so users can watch movies, play touch-based games or enjoy video chat in any position.

ENGADGET: Lenovo Q2 earnings reveal record high sales of $8.7 billion, highest-ever PC market share