目的：观察微重力条件下动态三维诱导骨髓间充质干细胞向软骨细胞的分化，并与静态培养作比较。

AIM: to observe the induction and differentiation of marrow mesenchymal stem cells (MSCs) into chondrocytes under dynamic microgravity and three dimensions (3d), and compare it with static culture.

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前言： 目的：观察寰枢关节在三维运动中接触面积及动态观察其稳定性的变化规律。

Objectives:To assess the changes of the contact area of atlantoaxial joint during three dimensional movements and to assess the regularity of dynamic changes related to the joint stability.

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它适用于三维重建过程中用户需要交互式地动态调整透明度变换函数，以观察三维实体的不同细节的应用场合。

It applies to the situation that the user needs to interactively adjust the opacity transfer function to observe the varied details of the3D object.

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