教师结构由显结构要素和潜结构要素组成；提出了教师结构“三高”目标，确定了教师结构优化的标准。
Teachers' constitution, which is made up of visible element and latent element, Furthermore, this essay puts forward "three high" objective and sets criteria of optimizing teachers' constitution.
也许旋涡星系m 51原本是一个巨大的星系，直径超过6万光年，有显尔易见的旋涡结构。
Perhaps the original spiral nebula, M51 is a large galaxy, over 60, 000 light-years across, with a readily apparent spiral structure.
通过使用标准XML模式，可以显式地定义数据的结构和类型。
Using standard XML schemas, the structure and type of the data is explicitly defined.
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