VOA慢速英语:空气污染可能影响身体的每个器官和细胞

toxin – n. a poisonous substance

particulate matter – n. the term for a mixture of solid particles and liquid droplets found in the air.

womb – n. the organ in women and some female animals in which babies develop before birth

contributor – n. something or someone involved in causing something to happen

exposure – n. the fact or condition of being affected by something or experiencing something : the condition of being exposed to something

dementia – n. a mental illness that causes someone to be unable to think clearly or to understand what is real and what is not real

standard – n. a level of quality, achievement, etc., that is considered acceptable or desirable

regulatory – adj. making or concerned with making official rules about what is acceptable in a particular business, activity, etc.