体积较小的小行星只不过是一些尘埃和陨石球粒的堆积物，其中这些圆状岩石形成于太阳早期高热量下融熔的尘埃。
Small asteroids are often little more than piles of dust and chondrules, the spherical pebbles of rock that formed from dust which melted in the heat of the young sun.
针对锥顶轨迹为单圆的锥形束体积重建问题，提出了一种基于平板检测器的T FDK算法。
A volumetric reconstruction algorithm named FT-FDK (flat-panel based tent FDK algorithm) is presented based on the ideas of Grasss T-FDK algorithm.
试用结果表明，这种成形器具有成纸匀度好，纸张纵横向抗张强度比小的特点，而且结构简单、体积小、制作容易、费用低，因而是一种很好的圆网成形器。
Productive practice and study of lateral flow vat showed that the paper's tensile ratio of machine—direction to cross—direction can be easily adjusted by employing a flow velocity regulating board.
试用结果表明，这种成形器具有成纸匀度好，纸张纵横向抗张强度比小的特点，而且结构简单、体积小、制作容易、费用低，因而是一种很好的圆网成形器。
Productive practice and study of lateral flow vat showed that the paper's tensile ratio of machine—direction to cross—direction can be easily adjusted by employing a flow velocity regulating board.
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