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）。
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)。
In this case, the foreshortened meteor flash is right of frame center, below the curving limb of the Earth and a layer of greenish airglow.
在这种情况下，缩短的流星对框架的中心，在弯曲的肢体的地球和一层绿色的气辉。
In the measurement of human upper limb, the position for the center of shoulder joint can be supposed by comparative position to acromion.
在人体测量中，肩关节中心的位置要通过其与肩峰的位置关系进行估测。
But near the east limb, the boundary toward the limb is more diffuse, and that toward the center is sharper.
但当它在东边缘附近时，向边缘的本影-半影边界较弥散，另一边的较清晰。
When the spot approaches the west limb, the penumbra toward the disk-center has no tendency to disappear.
当黑子接近日面西边缘时，向中心一方的半影没有消失的趋势。
When the spot approaches the west limb, the penumbra toward the disk-center has no tendency to disappear.
当黑子接近日面西边缘时，向中心一方的半影没有消失的趋势。
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