铁栅栏会弯曲并吸收冲击力。

Steel barriers can bend and absorb the shock.

《柯林斯英汉双解大词典》

当脚接触地面时，您的膝关节应该略微弯曲，一旦受力的冲击，可以自然地进一步弯曲。

As your foot strikes the ground, your knee should be slightly flexed so that it can bend naturally on impact.

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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 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."

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