The management of waste, air emissions and waste-water discharges.

废弃物、气体排放和废水排放的管理。

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The Environmental Protection Agency, in a statement last month, said it planned to revise standards for water discharges from coal-fired power plants like Hatfield’s Ferry.

美国环境保护局（EPA）在上个月发表了一份声明，计划修改火力发电厂（如哈德菲尔德渡船公司）用水排放的标准。

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For the second time since the Three Gorges Dam, the world's largest hydroelectric project, began operating, officials have had to make emergency water discharges from it to help ease the drought.

世界最大水电项目三峡大坝投运后第二次，官员不得不紧急下泄水库存水缓解旱灾。

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As water is flowing, the throttle is manipulated to control the water pressure being supplied to the discharges, this in turn affects the flow rate.

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They say Thames Water failed to act despite a series of earlier discharges from the network of pipes nearby.

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Some newer engines also have flow-rate monitors for the discharges, these show the rate of water flowing in Gallons per Minute (GPM) instead of raw pressure.

FORBES: What Do All The Controls On A Fire Engine Truck Do?