中新网1月15日电 北京师范大学大气环境研究中心主任田贺忠今日做客中新网《新闻大家谈》，解读连日雾霾天气产生原因及其影响。田贺忠指出，PM2.5指的是在大气里边悬浮的粒子，专业术语上叫空气动力学的当量直径小于等于2.5的粒子，它的危害本身是在于携带一些有害物质到达肺部，甚至可能直接进入血液系统，造成呼吸系统疾病。

Beijing on January 15, Beijing normal university, director of the center for atmospheric environment research TianHeZhong visit Beijing today[News we talk about],Reading for fog haze weather causes and effects.TianHeZhong pointed out that,PM2.5 refers to the atmospheric particles suspended in it,Professional terms that aerodynamic equivalent diameter less than or equal to 2.5 particle,It is the harm of itself to carry some harmful substance to the lungs,May even directly into the blood system,Cause respiratory disease.

　　连日来，中国中东部大部地区深陷十面“霾”伏，多地空气质量遭严重污染。尤其是北京，PM2.5浓度曾一度攀至700微克/立方米以上，多个监测点PM2.5指数接近900，在环境类手机应用软件上显示为“爆表”，并且已连续3天达到空气质量六级污染。

For the last few days,In most parts of east-central China in ten surface"haze"v,More air quality was serious pollution.Especially in Beijing,PM2.5 concentration once climb to 700 micrograms/m3,Multiple monitoring stations PM2.5 index is close to 900,In the environment like mobile application software for the show"Detonation table",And has three consecutive days to air quality six levels of pollution.

　　针对PM2.5“爆表”的问题，田贺忠表示，通俗来讲，也可能这么说，但是总体来讲，PM2.5指的是在大气里边悬浮的粒子，专业术语上叫空气动力学的当量直径小于等于2.5的粒子。早期的一些环境标准，叫TSP，一般叫它总悬浮颗粒物，指的是小于100微米一下的，它能在大气里面较长时间悬浮。

According to PM2.5"Detonation table"problem,TianHeZhong said,Popular terms,May say so,But generally speaking,PM2.5 refers to the atmospheric particles suspended in it,Professional terms that aerodynamic equivalent diameter less than or equal to 2.5 particle.Some of the early environmental standards,Called TSP,General call it total suspended particles,Refers to less than 100 microns of it,It can in the atmosphere for a long time in suspension.

　　田贺忠进一步指出，PM10，指的是动力学当量直径小于10微米的，而PM2.5近年来得到更多的关注是因为颗粒更细了，所以通俗叫可入肺的颗粒物，PM10可以通过呼吸系统到支气管黏膜，2.5以下的粒子，可能更进一步深入到肺泡里面，这是一个不可逆的过程，即使沉静下来，也没有办法把它洗出来。

TianHeZhong further points out,PM10 readings - which were taken,Refers to the dynamic equivalent diameter less than 10 micron,And PM2.5 in recent years to get more attention because the more fine particles,So popular that may enter the lung particles,PM10 readings - which were taken readings - which were taken by respiratory system to bronchial mucosa,2.5 the following particle,May further into the alveolar inside,This is an irreversible process,Even if the calm down,Also have no a way to wash it out.

　　田贺忠还表示，颗粒越小，表面积就会越大，比表面积就越大，它更容易吸附大气里边的病毒、细菌，以及一些有害的重金属元素，所以它的危害本身是在于它携带着这样的一些有害物质到达肺部，甚至是像1微米一下的，可能直接进入血液系统，所以可能造成呼吸系统疾病，而老人、小孩等易感人群会有更严重的反应。

TianHeZhong also said,Smaller grain size,Surface area will be bigger,The greater the specific surface area,It easier to adsorption air inside of the virus/bacteria,And some of the harmful heavy metal elements,So its harm is itself is that it carries such some harmful substance to the lungs,Even as a 1 micron,May be directly into the blood system,So may cause respiratory system disease,And the old man/The child and easy feeling crowd there will be more serious reaction.