虽然没有确切的统计数据，但OER项目的数量、涉及人员数量和可用资源数量迅速扩张。
Although no definite statistics are available, there is a rapid expansion in the number of OER projects, the number of people involved, and the number of resources available.
对于这个问题似乎没有确切的答案。但是透过一些统计数据和专家的分析估计，我们也许能够对这一问题得出相应结论。
There appears to be no clear answer to this question. But some statistics, as well as estimates from experts on the subject, provide some perspective on it.
对于这个问题似乎没有确切的答案。但是透过一些统计数据和专家的分析估计，我们也许能够对这一问题得出相应结论。
There appears to be no clear answer to this question. But some statistics, as well as estimates from experts on the subject, provide some perspective on it.
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