Effect of urban heat island can produce local secondary circulation and form regional convergence and divergence structure.

本文提出了城市次生热岛效应可导致局地次生尺度环流结构，形成区域性辐合或辐散结构。

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Rifled or other pipe wall corrugation may change the flow from a hetero-generous to a homogeneous regime by introducing a secondary circulation.

在有来复线的或其它的管壁皱纹的管中，由于引起副流，可能将非均质流转变为均质流。

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The results show that the distribution of wet % Q % -vector indicates the direction and intensity of the secondary circulation. The heavy storm rain may occur when the mesoscale circulation enhanced.

结果表明，湿q矢量散度场的分布反映了次级环流的方向和强弱，暴雨出现在中尺度环流明显增强时。

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On the secondary market, government bonds already in circulation are traded by banks and other financial institutions.

BBC: Italy's borrowing costs surge after election stalemate

On the secondary market, where government bonds already in circulation are traded by banks and other financial institutions, the yield on 10-year bonds fell below 6%.

BBC: ECB's Mario Draghi unveils bond-buying euro debt plan