He is trying to work out its body force.

他正在计算其体积力。

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The improved body force method is proposed for analyzing interaction behaviors of arbitrary multiple through-cracks under complex loading.

对任意二维型裂纹群，受复合载荷作用时的相互干涉效应，本文提出了改进型体积力法。

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The most important element that affects the specific throwing speed is the lower limbs explosive force , then the body force and last lower limbs maximum force.

对女子铁饼运动员专项投掷速度影响最大的是下肢爆发力，其次是躯干力量，下肢最大力量的影响相对较小；

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It seemed as if a heavy body was thrown against the table with a force that pushed against his chest.

VOA: special.2009.10.31

If you connect the body to a spring, which is neither compressed nor extended, there's no force acting on it.

如果将一个弹簧连在这个物体上,弹簧既没有被压缩也没有被拉伸,也不会有力作用在它上面

耶鲁公开课 - 基础物理课程节选

So, a massless body cannot have a net force on it, because the acceleration of the rope cannot be infinite.

所以没有质量的物体不会受到力,因为绳子的加速度不可能是无穷大

耶鲁公开课 - 基础物理课程节选

The Syrians are now able to shift the main body of their military force against Israel within one night.

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Those who own the best stuff will get rich, those who try to sell their body into the work force will become poor.

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The bill will grant an independent regulatory body the power to force phone and TV providers to sell assets if they control more than 50% of the national market share.

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