以下为句子列表：
英文: Then extends the efficiency measurement to the stochastic situation based on the expected value approach and presents the definition of the expected efficiency score, and finally a instance is given.
中文: 进一步提出了随机条件下决策单元的期望有效性指数概念和相对有效性评价的期望值方法，最后给出了计算实例。
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