This paper addresses the following aspects: (1) the theory research of circular economy demonstration construction in the industrial parks.

本论文主要进行了以下几个方面的研究：(1)产业园区循环经济示范建设理论研究。

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From 1989 to 1997, some experiments were done based on high-yield cultivation demonstration construction of dry and fresh fruitlet forests in Hunan.

1997年，依托湖南省干鲜小水果丰产示范林建设进行试验。

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Shallow layer geothermal energy, as a kind of renewable energy, more and more is paid attention by the people, most of which is applied to the larger-scale demonstration construction project.

浅层地温能作为一种可再生环保能源越来越受到广泛重视，现在主要推广在较大规模的建设示范项目中。

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Construction of the world's main demonstration power plant that will use magnetic confinement is under way at Cadarache in France.

ECONOMIST: Nuclear fusion

The pilot and demonstration are done, and the commercial production facility is under construction now in Pennsylvania the last time I checked.

FORBES: Biofuels Can't Cut Military Muster, Study Says

Representatives of these companies said that the conditions of the loans are such that they have to first build demonstration production lines, meet certain requirements, and only then tap the federal funds for additional construction.

WSJ: California Solar Deal Hits a Snag