live off someone/something
phrasal verb with live verb uk/lɪv/ us/lɪv/
依靠…生活
to use someone or something to provide the money or food that you need to live
All his life he had lived off his father. 他一辈子都靠父亲生活。
They had learned to live off the land (= grow or find their own food). 他们学会了靠土地吃饭。