困难群众 people in straitened circumstances/people in difficulties

贫困群众 people in financial difficulties

城市贫困群体 Urban Poor Group ; body of urban poor people

困在人群中 trapped in a crowd

特困群体 Special Difficulty Groups

贫困人群 the poverty

急难特困的群众 people with urgent or special needs

边缘贫困群体 marginal poverty

一群处于困境的旅客 He was stranded penniless