研究了文章结构清晰度对文章修改的影响。
This study was designed to investigate the effects of the definition of the text structure on text revision.
文章对数据库结构进行了合理的设计构思，使其具有信息分类明确、层次清晰、查询方便快捷、可扩充性好等特点。
This design of database structure is reasonable and has the characteristics of clear information classification, distinct arrangement, convenient to look up and easy to expand etc.
文章给出了矩阵的广义零空间的结构，使我们对矩阵的广义零空间有更清晰的认识。
The paper puts forward the structure of the generalized zero space of matrix briefly, so the zero space can be understood more clearly.
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