Since Qing Dynasty was founded, Fotang had gathered numerous businessmen, is the commodity circulation center of Yiwu.

自清代以来，佛堂镇商户云集，为义乌市内的商品流通中心。

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The position of the circulation center relative to a deep convective cloud cluster is associated with the upper tropospheric environmental flow.

这种环流中心与云团的相对位置关系和对流层上部的环境流场密切相关。

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On the east side of bda is the international container transit station and with the Beijing international goods circulation center, customs house, commodity inspection bureau on the north side.

开发区东侧有国际集装箱中转站，北邻北京国际物流中心及海关商检等机构，区内将设保税仓库等功能全的外向型经济配套设施。

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And this is one thing that Director Bill Reed was trying to get people not to focus just on the center of circulation or on the coast.

WHITEHOUSE: Press Briefing

Translating medical research into practice is never easy, but Dr. Ben Abella, a co-author on the Circulation paper and the clinical research director of the Center for Resuscitation Science, says that hypothermia is an especially hard pill for some to swallow.

CNN: Cooling is catching on for cardiac arrest patients

The time it took for ambulances to arrive on the scene was similar for men and women, according to researchers at the Institute for Clinical Research and Health Policy Studies at Tufts Medical Center in Boston, Massachusetts, who published the study in the journal, Circulation: Cardiovascular Quality and Outcomes.

CNN: Five ways to get ambulance workers to take you seriously