In this paper, starting from order exchange theorem of repeated limits, we synthetically discuss the above problems in order to understand them deeply.

我们从累次极限换序定理出发来综合讨论分析运算换序定理，以便对这类问题有较为深刻的认识。

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And the operators are improved by establishing the Order Exchange Unit and Order Exchange List to satisfy the need of integer coding in drilling path optimization.

通过建立序交换元和序交换集对算法的操作算子进行改进，满足钻削路径优化问题中整数编码的需要。

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In order to achieve these objectives, we must concentrate more on productions, the exchange of news, documentary services and training.

为了实现这些目标，我们必须把更多的精力集中在制作、新闻交流、纪录片服务和培训上。

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Crown Currency Exchange, which was established six years ago, allowed individuals and business customers to pre-order foreign exchange at a set price up to a year in advance.

BBC: Six more arrests in Crown Currency Exchange case

They may thus, say the three economists, have been buying in order to exchange over-valued equity for real assets.

ECONOMIST: Hostile bids are back again. Who should rejoice?

The region is forced to acquire dollar assets in order to avoid exchange-rate appreciation and deflation.

ECONOMIST: Economics focus