center of curvature [数] 曲率中心
principal center of curvature [数] 主曲率中心
absolute center of curvature 绝对曲率中心
the local center of curvature 局部曲率中心
center of principal curvature 助率中心
center of spherical curvature 球曲率中心
center of normal curvature [数] 法曲率中心
center of geodestic curvature [测] 测地曲率中心
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)。
Then the Center of Curvature test will be repeated and compared to the first test to ensure that the mirrors remain aligned.
然后将重复曲率中心测试并与第一测试进行比较以确保反射镜保持对准。
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