“有教养”用英语怎么说？

他们每天都和保姆一起在公园里散步，表现得很有教养。They go for decorous walks every day in parks with their nanny.他只是个有教养的中产阶级家庭的男孩。He's just a well-brought-up, middle-class boy.他是个世故、冷静、有教养的人。He is a suave, cool and cultured man....