来自于一些数据产生源的数据(在最后的一章里讨论)。
Data from some data generation source (discussed in the final section).
通过教育券推进公平，通过学校之间争夺生源的竞争提升效率。
This will promote fairness and efficiency through education vouchers and through competition between schools.
与此同时，随着更多的学生眼光提高，其他学校挑选生源的选择余地下降。
Meanwhile, as more students have set their sights higher, other colleges have become less selective.
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