以下为句子列表：
英文: Collect supply/demand data and conduct marketing analysis for olefin products.
中文: 收集烯烃产品的市场供需数据并做市场调研。
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英文: With the changes of electric power supply and demand and energy resources market situations the research and exploration of marketing analysis forecasting can realize normalization, scientism and high efficiency of selling market real-time analyzing syste
中文: 摘要随着电力供需形势的转变及能源市场行情的变化，研究和构建电力市场营销分析预测系统，可以使销售市场分析预测工作规范化、科学化、高效化。
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