新东方网英语讯 ：12日北京PM2．5指数濒临“爆表”，空气质量持续六级严重污染。北京环境监测中心专家表示，从污染形势预报的分析结果看，北京几乎所有区域仍被意味着最严重污染的“深褐色”覆盖，pm2．5指数最高站点为456。
Air pollution in Beijing reaches hazardous levels
On Sunday, the Beijing municipal government issued a warning on its website for PM-2.5 readings. It’s the third day that air pollution in the city has reached dangerous levels. The public are advised to stay indoors and to avoid strenuous exercise.
上周日，北京市委，市政府在其网站上发出警告，显示 PM-2.5。这是北京第三天城市空气污染已经达到了危险的程度。市民应留在室内，避免剧烈运动。
相关链接：北京空气质量持续严重污染 应急方案首次启动(双语)>>
Meng Jie and her friend were planning to go shopping on Sunday. But seeing the heavy smog, they decided to cancel their arrangement and go back home.
孟婕和她的朋友正准备去上周日购物。但是，看到浓烟，他们决定取消他们的安排和回家
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"The air pollution is quite serious. I’m already wearing a mask, but I still feel uncomfortable."
“空气污染是相当严重的。我已经戴了口罩，但我还是觉得不舒服。 ”
Many locals have expressed their concerns about the air quality in Beijing. Many are choosing to stay indoors, or are wearing masks if they have to go out.
许多当地人都表示了他们的关注，北京的空气质量。许多人选择留在室内，如果他们要出去戴口罩。
"It’s Sunday today. My son wants to go to the park, but I’m worried about the effect of the air pollution on his health."
“这是星期天今天，我的儿子要到公园去，但我很担心空气污染的影响，对他的健康。 ”
"I just arrived yesterday. The impression was quite bad yesterday. I rode my bicycle for 2 hours, and I didn’t feel very good."
“我只是昨天抵达。昨天给人的印象是很糟糕，我骑我的自行车为2个小时，感觉并不好。
"It’s awful. The air doesn’t smell right."
"这太可怕了，空气闻起来都不对。“
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Beijing’s air quality readings have reached dangerous levels for the third straight day. It’s the worst on record since the local government started collecting air pollution data a year ago.
北京的空气质量读数已经达到了危险水平，已经连续第第三天了。这是最糟糕的纪录，因为当地政府一年前开始收集空气污染数据。
According to real-time monitoring data from the environmental bureau, the density of PM 2.5 particulates exceeded 700 micrograms per cubic meter in many parts of the city, some even exceeded 900. The World Health Organization considers a safe daily level to be 25 micrograms per cubic meter.
根据环境局实时监测数据，在许多地区的城市， PM 2.5微粒的密度超过每立方米700微克，有的甚至超过900元。世界卫生组织认为，每天一个安全的水平是每立方米25微克。
Yu Jianhua, air quality control director from Beijing Municipal Environmental Bureau, said, "The temperature and humidity in Beijing have been rising over the last few days, which isn’t allowing the pollutants in the air to disperse. It’s caused the extreme haze in Beijing over the past three days."
从北京市环境保护局空气质量控制总监，于建华说，“在过去的几天里，这是不容许的污染物在空气中的分散，在北京的温度和湿度一直在上升。造成了极端的阴霾中北京在过去的三天。
PM 2.5 are tiny particulate matter less than 2.5 micrometers in diameter. They can penetrate deep into human lungs, causing severe health problems. Beijing’s air started to worsen on Thursday, and the local monitoring center says the haze is expected to linger until Tuesday.
PM 2.5是微小的直径小于2.5微米的颗粒物质。他们可以深入到人体肺部，引起严重的健康问题。北京的空气上周四开始恶化，本地监控中心预计这种阴霾会持续到周二。
科普时间：
雾霾： 雾是由大量悬浮在近地面空气中的微小水滴或冰晶组成的气溶胶系统，是近地面层空气中水汽凝结（或凝华）的产物。霾，是指空气中的灰尘、硫酸、硝酸、有机碳氢化合物等粒子使大气混浊的现象。
PM2.5是指大气中直径小于或等于2.5微米的颗粒物，也称为可入肺颗粒物。科学家用PM2.5表示每立方米空气中这种颗粒的含量，这个值越高，就代表空气污染越严重。
爆表，本是指仪表指针超过表上所示的极限。近几日，该科普性词汇被国内各媒体频繁使用，起因是位于北京的美国驻华大使馆自行监测到，其监测点附近的PM2.5瞬时浓度达到522微克/立方米，对应的空气质量指数（AQI）已经超过上限值，即出现“爆表”情况。不过，根据中新社报道，北京环保监测中心相关负责人表示，在专业的监测领域，并无“爆表”一词，只是某些仪器会人工设置一个最大量程，但该负责人并未透露PM2.5监测仪器的最大量程。
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（编辑：何莹莹) | 
发表于 2016-7-12 22:03:33