Group of China Obesity Task Force. Body mass index reference norm for screening overweight and obesity in Chinese children and adolescents[J]. Chinese Journal of Epidemiology, 2004,25(2):97-102.

（in Chinese） 中国肥胖问题工作组。中国学龄儿童青少年超重、肥胖筛查体重指数值分类标准[J]。 中华流行病学杂志，2004，25（2）：97-102。

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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

By simply piercing the surface of the water, you set off an energy force within the body of water that extends outward, impacting anything it touches.

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According to Einstein, the force of gravity keeping your feet on the ground is fundamentally identical to the force slamming your body forward when you hit the brakes on the highway or take a sudden sharp turn.

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Seat belts could, in the 100 milliseconds of a crash, avoid breaking an old lady's ribs by calibrating how much force to apply to a body after gathering sensor data on the car's speed and deceleration and the weight and position of the occupant.

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