transient
adjective formal uk/ˈtræn.zi.ənt/ us/ˈtræn.zi.ʃənt/
短暂的，转瞬即逝的;暂时的
lasting for only a short time; temporary
A glass of whisky has only a transient warming effect. 一杯威士忌只能使人暖和一会儿。
The city has a large transient population (= many people who are living in it only temporarily). 这个城市有大量的暂住人口。
transient
noun [ C ] mainly US formal uk/ˈtræn.zi.ənt/ us/ˈtræn.zi.ʃənt/
暂住者;流动人口
someone who lives only temporarily in a place
It's an organization set up to provide money and help for transients. 这个组织建立的目的就是给暂住者提供钱款和帮助。