写雾霾天气的英语作文（双语）
As the saying goes "qiu dong smog knife to kill". We can see and catch "smog" actually have bigger influence on the body, especially the high incidence of respiratory and cardiovascular and cerebrovascular diseases in the elderly group.
1. The effects on the respiratory system. Haze composition is very complicated, including hundreds of atmospheric chemistry particulate matter. Which is bad for your health mainly aerosol particles less than 10 microns in diameter, such as mineral particles, sea salt, sulfate, nitrate, organic aerosol particles, fuel and car exhaust, etc, it can directly enter and adhesion in the human respiratory tract and alveoli. Especially the submicron particles are deposited on upper and lower respiratory tract and alveolar, causes the disease such as the acute rhinitis and acute bronchitis. For obstructive bronchus asthma, chronic bronchitis, emphysema and chronic respiratory diseases such as chronic obstructive pulmonary disease patients, haze weather can make the illness acute or acute exacerbation. If this kind of environment will cause lung cancer for a long time.
2. The effects on the cardiovascular system. Haze weather pollutants in the air, air pressure is low, easy to induce acute cardiovascular disease. Such as heavy fog, the moisture content is very high, if people in outdoor activities and sports, the body's sweat is not easy to discharge, cause people bosom frowsty, increased blood pressure.
3. The fog haze weather can also result in close formation ultraviolet weakened, activity of the infectious pathogen in the air, increase of infectious diseases.
4. Reduce because of the fog the sun, ultraviolet irradiation in children is insufficient, inadequate vitamin D in the body to generate, the absorption of calcium significantly reduce, serious can cause rickets in infants, children's growth to slow down.
5. Affect mental health. Heavy fog weather depression, due to weak light and easy to let a person produce mental laziness, depression, and pessimism, encounter something goes wrong and even easier to spin out of control.
6. Affect the traffic safety. Low vision in haze weather, visibility, air quality is poor, easy to cause traffic jams, traffic accidents.
常言道“秋冬毒雾杀人刀”。我们看得见、抓不着的“雾霾”其实对身体的影响较大，尤其是对心脑血管和呼吸系统疾病高发的老年人群体。
1.对呼吸系统的影响。霾的组成成分非常复杂，包括数百种大气化学颗粒物质。其中有害健康的主要是直径小于10微米的气溶胶粒子，如矿物颗粒物、海盐、硫酸盐、硝酸盐、有机气溶胶粒子、燃料和汽车废气等，它能直接进入并粘附在人体呼吸道和肺泡中。尤其是亚微米粒子会分别沉积于上、下呼吸道和肺泡中，引起急性鼻炎和急性支气管炎等病症。对于支气管哮喘、慢性支气管炎、阻塞性肺气肿和慢性阻塞性肺疾病等慢性呼吸系统疾病患者，雾霾天气可使病情急性发作或急性加重。如果长期处于这种环境还会诱发肺癌。
2.对心血管系统的影响。雾霾天气空气中污染物多，气压低，容易诱发心血管疾病的急性发作。比如雾大的时候，水汽含量非常的高，如果人们在户外活动和运动的话，人体的汗就不容易排出，造成人们胸闷、血压升高。
3.雾霾天气还可导致近地层紫外线的减弱，使空气中的传染性病菌的活性增强，传染病增多。
4.由于雾天日照减少，儿童紫外线照射不足，体内维生素D生成不足，对钙的吸收大大减少，严重的会引起婴儿佝偻病、儿童生长减慢。
5.影响心理健康。阴沉的雾霾天气由于光线较弱及导致的低气压，容易让人产生精神懒散、情绪低落及悲观情绪，遇到不顺心的事情甚至容易失控。
6.影响交通安全。出现霾天气时，视野能见度低，空气质量差，容易引起交通阻塞，发生交通事故。