Secondly, having a analysis on the problems of the Engineering Training Center and its causes.

其次，分析实训中心的问题及其成因。

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By making analysis on the problems occurring in operation and the causes, the issues for attention were described.

通过对出现的问题及其原因的分析，阐述了运行期间需注意的事项。

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With full and accurate data, the author made a thorough analysis on the problems existing in China's cocoon silk exports and their causes.

通过大量资料和数据分析了我国茧丝绸出口中存在的问题及其原因。

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