The study on unifying several kinds of force is the "Unification Field Theory", which was put forward by Albert Einstein at the beginning of the 20th century.
研究将几种力统一起来的理论叫做“统一场论”，它是由阿尔伯特·爱因斯坦于20世纪初提出来的。
According to the analysis of the speed force of muscle contraction in track and field, the author point out the power training theory.
通过对田径运动中肌肉收缩速度力量分析，提出了提高运动员专项速度力量的训练原理。
In this article the mathematical expression of field synergy theory for three dimensional flow with centrifugal force was derived by integrating the energy equation in the concerned volume.
通过对能量方程进行体积分得到了三维流场中场协同理论的表达式。该式不仅含速度矢量与温度梯度矢量的点积项，还含有速度矢量与压力梯度矢量的点积项。
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