We also will improve the circulation system for agricultural production materials.

完善农业生产资料流通体系。

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Launch circulation economic research and practice, construct the circulation system of economics and society.

开展循环经济研究和实践，构建循环经济社会系统。

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The circulation system of the artistic market is made up by the artist, critic, operator (or the broker), collector, museum and researcher.

艺术市场的流通系统是由艺术家、批评家、经营者(或经纪人)、收藏家、博物馆和研究者组成的。

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To find the body's secret weapon, scientists remove cells from a lymph node - a part of the circulation system used by immune cells, but which also often forms a "staging post" for cancer as it spreads around the body.

BBC: Supercharged cells fired at skin cancer

The US Federal Reserve has a system to control the amount of currency in circulation.

FORBES: Yes, Spanish Crisis Has Triggered the Euro's Endgame

In the three minutes and nine seconds of Scott Manley's YouTube video, each asteroid discovery over the past 30 years emerges as a bright shock of color on a mostly black background, a map of the earth's circulation in our solar system.

FORBES