Knowledge is like money: to be of value it must circulate, and in circulating it can increase in quantity and, hopefully, in value.

知识就像钱一样，只有在流通中才能体现价值，而且在流通过程中，其数量会增加，很有可能还会增值。

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Research about solid particle characters in circulating fluidized bed is very important to study the principle of gas-solid two phase flow.

循环流化床内固相颗粒运动特性的研究对于揭示床内气固两相流机理具有重要意义。

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The investigation on hydrodynamics & heat transfer in the bottom zone in circulating fluidized beds (CFBs) is of importance for engineering applications.

循环流化床（CFB）底部区流动与传热特性的研究是一个具有十分重要的工程背景的课题。

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Now, we're not thinking about total antibody concentration because you already have a lot of antibodies circulating within your blood and in your fluids.

现在,我们先不考虑抗体总浓度,因为你的体内已存在许多抗体,在血液以及体液中循环

耶鲁公开课 - 生物医学工程探索课程节选

Antibodies are outside of cells circulating in your extracellular fluid.

抗体在细胞外的 细胞外液中循环

耶鲁公开课 - 生物医学工程探索课程节选

So, if you look in the blood of patients that are infected with Hepatitis B you find a lot of Hepatitis B surface subunits, proteins without the nucleic acid circulating in their blood.

因此,如果你观察一下,已经感染乙肝病毒患者的血液,你会发现许多乙肝病毒的表面亚基,以及血液循环中存在没有核酸的蛋白质

耶鲁公开课 - 生物医学工程探索课程节选

The same figure in James Stirling's Neue Staatsgalerie in Stuttgart is perfectly in tune with the multiculturalism circulating in that eclectic building.

ECONOMIST: Architectural styles

The one that we heard about this week was a new variant in gay men that seems to be circulating in several cities.

NPR: Tracking a New Strain of Drug-Resistant Staph

To get a head start, Chiron takes a gamble by producing one of the strains in December, taking its cue from strains circulating in the southern hemisphere.

FORBES: Broken Eggs