As geologists, we examine layers of sediment on the Earth' s surface to approximate the dates of past geologic time periods.
作为地质学家，我们研究地球表面的沉积层以估算过去地质时期的年代。
The object 's surface often possesses some particular geometric continuities such as the continuity of position, of the tangent plane and even of curvature.
实体的表面一般都具有一定的光滑性，比如位置连续、切平面连续甚至曲率连续。
SpaceShipOne will fly 100km (62 miles) above the Earth"s surface, just breaking through the planet"s atmosphere.
“太空飞船一号”将会在距离地球表面100千米（62英里）的上空飞行，这个高度刚刚超出地球的大气层。
The synthetical results show that skew spindle high pressure finishing is proved to be an ideal technology to improve large and middle size disc_type part′s surface and performance.
研究表明，叉轴式强力滚磨加工技术是改善大中型盘类零件表面质量、提高使用性能的理想工艺。
The synthetical results show that skew spindle high pressure finishing is proved to be an ideal technology to improve large and middle size disc_type part′s surface and performance.
研究表明，叉轴式强力滚磨加工技术是改善大中型盘类零件表面质量、提高使用性能的理想工艺。
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