对于渐开线圆柱斜齿轮的三维建模在以前来说是相当困难的。
It was very difficult that the three-dimensional modeling to involute-column-bevel gear before.
熟练掌握CAD制图、识图，对三维建模、曲面有一定的基础；
Master CAD drawing, knowledge chart, the 3 d modeling, curved surface has the certain basis;
主窗口是三维窗口，你可以在里面建模。
Main window is the 3d window in which you can model your stuff.
三维心脏建模是医学图像分析领域中正在研究的热点课题。
Three-dimensional (3D) cardiac modeling is an important area of research in medical imaging analysis.
三维心脏建模是医学图像分析领域中正在研究的热点课题。
Three-dimensional (3D) cardiac modeling is an important area of research in medical imaging analysis.
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