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肺活量指数：表示每千克体重的肺活量，它是反映人体机能较简易而有效的指标．大体上可以间接地反映人体的最大援氧水平和心肺功能。肺活量指数
Spirometry index: that per kilogram of body weight of vital capacity, it is a more simple and effective indicator of human function. In general, it can indirectly reflect the body’s maximum level of oxygen support and cardiopulmonary function. Vital capacity index