As a refresher, let's review what has been established in this example so far.

作为复习，让我们回顾一下该示例到目前为止建立了哪些内容。

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So far, only 40 countries have established a 100% voluntary blood donation system.

迄今为止，只有40个国家已建立了100%的自愿献血制度。

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So far we have established several branches in more than one city.

至今为止我们已在多个城市建立了分支机构。

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So far there has not yet established a mature theory in entrepreneurship research.

创业领域至今还没有形成一个成熟的理论。

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So far there has not yet established a mature theory in entrepreneurship research.

创业领域至今还没有形成一个成熟的理论。

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