VOA慢速英语:南丁格尔叫我们去洗手

exhibition – n. an event at which objects (such as works of art) are put out in a public space for people to look at : a public show of something

nurse – n. some who cares for the sick or older adults

perfume – n. a substance that produces a pleasant smell

consultant – n. a person who provides advice to someone else

emphasis – n. special importance or attention given to something

hygiene – n. conditions or actions necessary for good health

principle – n. a law or rule

lamp – n. any kind of device for producing light

uniform – n. a special kind of clothing that is worn by all the members of a group or organization (such as an army or team)