primary growth equation 原始增长方程
primary equation
基本方程
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The primary care model has drawn insurance industry opposition in part because the health insurer middleman is cut out of the equation as doctors are no longer paid by the likes of Aetna (AET), Humana (HUM) or a UnitedHealth Group (UNH).
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