inverted u-shaped curvilinear
inverted u-shaped curvilinear
倒u型曲线
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Graphically, the coefficients of education level form an inverted U-shaped curvilinear. (4) the city residents who don't have a residence registration will face a worse health demand.
就图形上来看，教育对健康需求的影响系数是一条倒u型曲线。(4)没有城市户籍的城市居民会面临更严重的健康需求的下降。
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