The two theorems are proved that any ring can be extended into an algebraically closed ring and that the quaternionic skew field over a real closed field is algebraically closed.

证明了任一环有代数封闭的扩张环，且实封闭域上的四元数体是代数封闭的，给出了代数封闭环的若干性质。

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That is, the real database connections are closed relatively infrequently, but their pooled proxies are acquired and released with every transaction.

也就是说，真正的数据库连接会相对较少关闭，但它们的池代理则会随着每个事务获取或释放。

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That means the easy way of devoting more resources to the frontline in Afghanistan - scrapping the big-ticket items that serve little real purpose - is closed off.

这就意味着，向阿富汗前线提供更多资源的简单办法就是取消这些实际意义不大的大牌项目。

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Inspired by the brilliance of Cristiano Ronaldo, Real closed to within two points of leaders Barcelona at the top of the Spanish Primera Liga.

CNN: STORY HIGHLIGHTS

Moreover, Chinese media reports have said that around 1, 000 real estate agencies have closed so far this year, with 177 in October.

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Special Offer: RMR Asia Pacific Real Estate (RAP) a closed-end fund trading at a 21% discount to NAV.

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