首先对现代学校的精神气质的理论背景做了介绍，进而界定了何谓现代学校的精神气质，并粗略地概括了学校现代性精神气质的特征及其表现。
First it has made the introduction to the theory background, then has defined what is modern ethos of schools, and sketchily summarized its characteristic and the representation.
一个目标性的灯光是以尽可能多的灰度由四周的背景中去分开这特征或你想观察的部份。
One objective of lighting is to separate the feature or part you want to inspect from the surrounding background by as many gray levels as possible.
背景：肿瘤细胞的染色体数目畸变是肿瘤细胞的特征性改变之一。
Background: Chromosomal number abnormality is one of the characteristic changes in tumor cells.
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