短語詞組短語gravitational gradient field 引力梯度場gravitational potential field 引力位場gravitational condensation field 引力場gravitational condensation field equations 重力場方程gravitational stress field 自重應(yīng)力場gravitational field energy density 引力場能量密度Gravitational Field Flow Fractionation 重力場流分離stable gravitational field 穩(wěn)態(tài)重力場weak gravitational field 弱場引力 返回 gravitational field