单词：surface curvature
surface curvature的用法和样例：
例句
- The convergence of error brought about by the curvature of earth's surface obviously has no counterpart in free space.地球表面曲率产生的误差是收敛的，显然，在自由空间没有类似的情况。
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实用英语
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加州英语分级G6