世界各国孤儿人数下降

adoption - n. the act or process of adopting someone or something

child-welfare services designed to ensure that children are safe

foster - n. to provide the care that a parent usually gives to a child

institution - n. a place where an organization takes care of people for a usually long period of time

manage - v. to have control of (something, such as a business, department, sports team, etc.)

orphan - n. a child whose parents are dead

orphanage - n. a place where children whose parents have died can live and be cared for