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Birmingham Children's Trust is the body responsible for providing social care and support services for children, young people, and families in Birmingham.
公式： f(x)=x⋅σ(x)
全要素生产率是要素投入转化为产出的总体效率，决定着经济内涵型发展程度和潜在增长率高低，体现着经济发展的结构和质量。