二维电影通常用的拍摄手法——两个角色并排站着，用很简单或者模糊的背景作衬——三维电影中却不常用。
Typical shots that have been used a lot in 2D filmmaking--two characters standing side-by-side, against a plain or a blurry background--really don't offer that much in 3D.
接下来研究了两个可焊接的排样问题，这两个问题分别是一维可焊接和二维可焊接的排样问题。
Then, in the second and third problems, this paper discusses two cutting stock problems in which items can be welded.
最后，在前面二维模拟的基础上，建立了三维气粒两相湍流流动数值模拟的数学模型，并用此模型对气粒两相气粒两相矩形射流进行数值研究。
At last, three-dimensional mathematical model of gas-particle two phase turbulence was established, and it was adopted to study the gas-particle two phase rectangular jet as well.
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