矩形建筑物，作用在短方向上的横向荷载(如上所示)普遍对主要抗侧力体系(LFRS)造成主要问题。
In rectangular buildings, lateral loads acting in the short direction (as shown above) generally pose the greatest problem to the primary lateral force resisting system, (LFRS).
背景：肱骨骨折治疗中经常遇到的主要问题在于应力加载的方向与应力加载的力值。
BACKGROUND: During the therapy of the fracture of humerus, the main problem is the loading direction and power of the stress.
尾部对主要力（球体运动）的方向变化产生反作用，只是这种作用由于动力的影响而受到了延迟。
The tail reacts to that change of direction in the primary force (the ball moving), yet it is delayed due to the resistance of momentum.
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