主要观察指标：年龄、绝经年限、绝经年龄、身高、体质量和人体质量指数与骨密度的相关性及回归方程。
MAIN OUTCOME MEASURES: the correlation between age, menopausal years, menopause age, height, body mass, BMI and bone density as well as the regression equation.
‘所放屁的质量和速度，’在那封极其讨我欢心的邮件中，他写道，‘与人体质量相比相当之小。’
'the mass and velocity of the expelled gas,' he told me in an E-mail that has forever endeared him to me,.
由于病人体质特殊或者病情危笃可能对病人产生不良后果和危险的检查和治疗；
The examination and treatment which may result in harmful consequences and danger to the patient with special physical constitution or suffering from critical illness; or.
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