Asthmaisalungdiseasethatinflamesandnarrowsyourairways，normallyasyouinhale,airmovesfreelythroughyourtracheaorwindpipethenthroughlargeTubescalledbronchi,smallerTubescalledbronchiolesandfinallyintotinySacscalledAlveoli,smallbloodvesselscalledcapillariessurroundyourAlveoli.
asthman.〈医〉气喘;哮喘
inflamevt.激怒；使燃烧；使发炎
narrowadj.狭窄的，有限的；勉强的
airwayn.航线，航路;气道;(麻醉时用的)导气管
inhalevt.吸入；猛吃猛喝
trachean.气管,导管,螺旋纹管
windpipen.气管
bronchin.支气管
bronchiolesn.细支气管
alveolin.气泡,肺泡类；齿槽突起
capillaryn.毛细管;毛细血管
oxygenfromtheairyoubreathepassesintoyourcapillaries,thencarbondioxidefromyourbodypassesoutofyourcapillariesintoyourAlveoli,sothatyourlungscangetridofitwhenyouexhale.
oxygenn.〈化〉氧,氧气
carbondioxide二氧化碳
exhalevt.vi.呼出;发散出
yourbronchiolesexpandwhentheairiswarm,moistandfreeofirritantsandallergycausingsubstancescalledAllergens.whenAiriscoldordryorcontainsirritantsorallergens,yourbronchiolescontract,ifyouhaveasthma,yourairwaysarefrequentlyinflamedandswollen,certainsubstancescancauseyourinflamedairwaystooverreactevenmoreresultinginanasthmaattack.
moistadj.潮湿的,微湿的
allergenn.变应原
swollenadj.肿胀的，浮肿的；浮夸的；激动兴奋的
overreactvi.反应过火
triggersofasthmaattacksareslightlydifferentforeveryone,butusuallyincludeoutdoorirritantsandAllergenssuchaspollen,smokepollutionandcoldweather.indoorirritantsandallergenssuchasmold
petdanderdustmitesandcockroachdroppings.foodAllergenssuchasfish,shellfish,eggs,peanutsandsoy,andconditionssuchasrespiratoryinfections,stressstrongemotionsandexercise.
triggern.触发器；触发物
pollenvt.传授花粉给n.花粉
petdander宠物皮屑
cockroachdroppings蟑螂粪便
soyn.酱油;大豆
respiratoryadj.呼吸的,呼吸用的
thesymptomsofanasthmaattackincludecoughing,wheezing,shortnessofbreathandtightnessinyourchest,duringanasthmaattackalsoknownasabroncospasm,themusclesaroundyourairwaystightenandtheairwaywallbe