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1·It doesn't have to be a real container to contain it it's just an imaginary boundary there.

它不必是，一个真实的容器，只是一个想象的边界。

2·The method of solving the implicit scheme of difference equations by means of imaginary boundary condition was proposed.

提出了应用“假想边界”求解数学模型的隐式差分格式的方法。

3·The area is filled if the number of boundary lines going in one direction (relative to the imaginary line) is not equal to the number of boundary lines going in the other direction.

如果朝一个方向(相对于想象的线)的边界线的数量不等于朝其它方向的边界线的数量，那么该区域是已填充的。

4·In order to solve universe singularity problem, Hawking introduces imaginary time and establishes no-boundary universe model.

霍金为了解决奇点疑难问题，引入了虚时间，构建了无边界宇宙模型。

5·If the imaginary line crosses an even number of boundary lines, the area can either be filled or not filled.

如果想象的线交叉过一条偶数的边界线，那么该区域可以是已填充的或未填充的。

6·The enclosed area is filled only if that imaginary line crosses an odd number of boundary lines.

封闭区域只在如果想象的线与边界线的奇数数量交叉时才被填充。