接着，一头野牛也用角来顶他，狮子无助地躺在那里。

Then a bull gored him with his horns. The lion still lay helpless before them.

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测量齿顶圆直径估算分度圆螺旋角，用分度头在铣床上修正分度圆螺旋角，并进行误差分析。

The spiral angle of graduated circle was rough estimated by measuring the addendum circle diameter and modified on milling machine.

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推导出用三顶点的测地坐标计算地球椭球面上三角形面积的公式。

The formula for area of triangle on ellipsoid by means of geodesic coordinate is derived in this paper.

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