The de-normalization causes difficulty on data retrieval, analysis, and quality control.
这种不规范将为数据检索、分析和质量控制增加难度。
The disintegration of soft rock often causes great difficulty to engineering.
软岩的崩解、泥化往往给工程带来困难和损失。
The second part discloses the current situation and the causes of the study difficulty.
第二部分揭示了学困生学习困难的现状与成因。
The second part discloses the current situation and the causes of the study difficulty.
第二部分揭示了学困生学习困难的现状与成因。
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