事实上，如果从原点观察，由一个带点粒子产生的电场，其方程与上述方程是一样的，类似的例子还有磁场等等。
Actually, if you look at the electric field generated by a charged particle at the origin, it is given by exactly the same kind of formula, and there are magnetic fields and so on.
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.
目的：观察老年性白内障术后血脂、血沉方程K值测定结果并分析其临床意义。
Objective: To examine and study the clinical significance of blood Lipids and Erythrocyte sedimentation rate equation K's value after the operation of senile cataract patients.
应用推荐