First introduce the reuse of the mixed water, and then white water closed system and several typical zero discharge processes in pulp and paper plants are presented.

介绍了造纸工业水循环回用技术的进展，对造纸过程中段水的回用做了讨论，并对造纸白水封闭循环系统和制浆造纸企业常用的零排放流程做了介绍。

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This paper reviews the structure, source, biological function of cecropins and their application in plants and animals, and discuses their existing problems and perspectives.

本文综述了天蚕素抗菌肽的结构、来源、生物作用，重点介绍了天蚕素抗菌肽的应用，并对其存在的问题和未来发展前景进行分析。

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In the early years it led to a paper presenting evidence that yes, under the same conditions, plots with more species of plants eventually tend to yield more biomass than plots with fewer species.

实验早期发表的论文显示的证据说明，在相同条件下，含有更多种植物的试验田最终的确比含较少物种的试验田生产出更多生物质。

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University of Arizona extension experts say covering plants and small trees with cloth or paper can help prevent frost damage.

VOA: special.2010.01.12

Fearing the environmental damage the paper plants might cause, Argentines on the river have been demanding a halt to their construction.

ECONOMIST: Argentina and Uruguay

These boxes can coordinate the more complex arrays of tasks required in food, beverage and paper plants--new territory for Rockwell--and zip production data to back-office computers so customers can react sooner to blips in supply and demand.

FORBES: Choreographer of the Assembly Line

Reduced flow rates on China's greatest rivers have made hydro plants reduce badly needed power output: many smelters, paper mills and petrochemical plants are no longer sure of getting the huge amounts of water they require.

ECONOMIST: China and water