这个装置是他于1949年首先建造的，旨在论证一个经济体系中收入是如何循环流动的。
Educated as an engineer, he later converted to economics. His machine, first built in 1949, is meant to demonstrate the circular flow of income in an economy.
这种努力促使以物料循环利用为核心、物质闭环流动型的循环经济，取代传统的、物质单向流动的线性经济。
Such endeavor promoted the substitution of the traditional and unidirectional linear economy for the material closed-loop flow circulation economy having material circulation utilization as its core.
热循环回路是循环流化床(CFB)锅炉的关键系统，其循环流动特性和热力特性直接影响CF B锅炉的安全经济运行。
The thermocycling loop is a key system of circulating fluidized bed (CFB) boiler, its circulating flow and thermodynamic characters directly affect safe and economic operation of CFB boiler.
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