Markets have been volatile and we believe that they will remain volatile until the U.S. Securities and Exchange Commission begins to rein in the activities of the high frequency trading community.

市场一直不稳定。我们相信市场会继续波动，直到美国证券交易委员会着手管理高频率交易团伙的活动。

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The results demonstrate that HFOV can maintain normal gas exchange. The effectiveness of HFOV correlates predominately with the amount of tidal volume and the rate of frequency, especially the former.

结果表明：hfov能维持正常气体交换功能，其效能明显受潮气量大小和频率高低的影响，以潮气量的作用更为突出。

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Putong peach had higher genetic similarity and frequency of gene exchange by dendrogram of RAPD bands.

从RAPD带型聚类图分析，普通桃类的遗传相似系数较高，基因交换频繁。

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We would all be better off if our leaders in government recognized that when we trade, we're exchanging products for products--money merely the measuring rod of value that increases the frequency of exchange.

FORBES: The sheer folly of currency devaluation.

By contrast, workers in groups with a lower frequency of favor exchange were only more productive when they received more favors than they gave.

CNN: Helping yourself by helping others

The SEC is also studying the effects of various trends that have shaped the U.S. stock markets over the course of the last decade, including the proliferation of high frequency trading and of off-exchange trading in so-called dark pools.

FORBES: SEC Sets 6-Month Test of Stock Circuit Breakers