According to the resource and characteristics of urban recycling water, water quality control indices should include basic control indices and selective control indices.

根据再生水的来源及性质，将灌溉绿地水质控制项目分为基本控制项目和选择控制项目两类。

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The principle and scheme of selective control on process variables of LPG absorbing tower by use of DCS is explained in detail, including the selection and implementation of field instrument.

本文详细介绍了应用d C s对液化气吸收塔的工艺参数实现选择性控制的原理和方案，以及现场仪表的选型和实施。

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Academies are non-fee paying, non-selective state schools, which operate outside the control of local education authorities and have private sponsors.

BBC: NEWS | UK | UK Politics | Cameron warning to grammar rebels

"While Defenders has always recognized that professional control of wolves that prey on livestock is a necessary evil, allowing random, non-selective take through public hunting and trapping is a poor wildlife management decision, " warned Nina Fascione, Defenders of Wildlife associate director of species conservation.

CNN: Defenders of Wildlife oppose gray wolf bill