寫霧霾天氣的英語作文（雙語）
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“秋冬毒霧殺人刀”。我們看得見、抓不著的“霧霾”其實對身體的影響較大，尤其是對心腦血管和呼吸系統疾病高發的老年人群體。
1.對呼吸系統的影響。霾的組成成分非常復雜，包括數百種大氣化學顆粒物質。其中有害健康的主要是直徑小于10微米的氣溶膠粒子，如礦物顆粒物、海鹽、硫酸鹽、硝酸鹽、有機氣溶膠粒子、燃料和汽車廢氣等，它能直接進入并粘附在人體呼吸道和肺泡中。尤其是亞微米粒子會分別沉積于上、下呼吸道和肺泡中，引起急性鼻炎和急性支氣管炎等病癥。對于支氣管哮喘、慢性支氣管炎、阻塞性肺氣腫和慢性阻塞性肺疾病等慢性呼吸系統疾病患者，霧霾天氣可使病情急性發作或急性加重。如果長期處于這種環境還會誘發肺癌。
2.對心血管系統的影響。霧霾天氣空氣中污染物多，氣壓低，容易誘發心血管疾病的急性發作。比如霧大的時候，水汽含量非常的高，如果人們在戶外活動和運動的話，人體的汗就不容易排出，造成人們胸悶、血壓升高。
3.霧霾天氣還可導致近地層紫外線的減弱，使空氣中的傳染性病菌的活性增強，傳染病增多。
4.由于霧天日照減少，兒童紫外線照射不足，體內維生素D生成不足，對鈣的吸收大大減少，嚴重的會引起嬰兒佝僂病、兒童生長減慢。
5.影響心理健康。陰沉的霧霾天氣由于光線較弱及導致的低氣壓，容易讓人產生精神懶散、情緒低落及悲觀情緒，遇到不順心的事情甚至容易失控。
6.影響交通安全。出現霾天氣時，視野能見度低，空氣質量差，容易引起交通阻塞，發生交通事故。
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