subsistencen.生存；生计；存在subsistence farmer自然经济,自给农民subsistence rights生存权subsistence farmingn.少有余粮的农场经营subsistence program给养计划subsistence changes生计转型subsistence expense生活费用subsistence farmers自给农subsistence support给养保障subsistence economy仅能维持生存的经济subsistence benefit最低生活费补助