In a negative curvature model, two lines that would be parallel on a flat plane will extend away from each other.
在负曲率模型下，平面上平行的两条线可能彼此远离。
A great portrait photographer considers shapes, lines, framing, angles, negative space, where to place the point of focus in the frame for maximum impact, and so on.
一个伟大的人像摄影师考虑形状、构图、框架、角度、负空间、以及把焦点设置在哪里可以获得最大的视觉冲击等等。
By changing the exposure series, the positive and negative lines with the same micron number can be exist on the tested plate.
通过改变曝光系列，总是可以在印版上复制出某一曝光量下相同微米数的阳像和阴像线条。
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