Although effort is required to bend a joint or flex a muscle, the body is able to recycle much of the energy expended through spring-like tendons and elegantly arranged muscles.
尽管需要花力气去弯曲关节或拉伸肌肉，但人体可以利用弹簧般的肌腱和分布优雅的肌肉来回收相当部分的能量。
But what they certainly advocated is that just as exercise is good for the body, so fasting is a spiritual exercise, allowing us to flex the muscles of the soul.
但他们肯定提倡的是，正如运动是对身体有益，因此禁食是一种精神锻炼，让我们灵魂的弯曲肌肉。
The unshod runners' style causes more flex in the foot's springlike arch ankle and knee and engages more foot and calf muscles blunting the impact on the body and making for a more comfortable "ride."
赤足的姿势引起了足部海面拱体、踝骨和膝盖更大的弯曲，更多地利用了足部和腿肚上的肌肉的力量，从而减弱了冲击对人体产生的影响，使人跑起来更舒服些。
The elderly are tend to flex hip joint more and use hip extensor muscle to propel the body forward.
老年人在上坡时倾向以弯曲髋关节，多用髋伸直肌群的策略使重心向前，身体推进。
The structure can allow the rod body to flex and deform freely in certain size range.
这种结 构可以使棒体在一定尺寸范围内可自由伸缩、变形。
The structure can allow the rod body to flex and deform freely in certain size range.
这种结 构可以使棒体在一定尺寸范围内可自由伸缩、变形。
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