The curvature of the Earth’s horizon (the limb) is clearly visible, as is the faint blue line of the upper atmosphere directly above it (at image top center).

地球地平线的曲线（周边）清晰可见，它的正上方隐约显现出高层大气的蓝线（图片中上部）。

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The curvature of the Earth's horizon (the limb) is clearly visible, as is the faint blue line of the upper atmosphere directly above it (at image top center).

地球地平线的曲线(周边)清晰可见，它的正上方隐约显现出高层大气的蓝线(图片中上部)。

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Numerical techniques related to the calculation of normal vector, tangential velocity, curvature and contact line are explained in detail.

文中介绍了有关泡面法向矢量、切向速度、曲率和接触线等的计算技术。

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Together with the light-catching contour formed by the curvature of the vehicle flank and the line that rises from the level of the door sill towards the dropping line, this creates a unique interplay of lines that adds to the sense of powerful elegance.

ENGADGET: Mercedes-Benz GLA concept puts laser projectors in headlights, redefines SUV

To work, microwave requires a line of sight between masts but the curvature of the earth sometimes makes that impossible.

ECONOMIST: Another peril for paradise