Running causes the muscles to shorten and stretching helps them re-establish their resting length, so you don't feel stiff afterwards.

跑步过程会使肌肉的长度变短，这种拉伸练习可以帮助肌肉重新恢复至其安静状态时的长度，从而不会使你在练习过后感到肌肉僵硬。

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Results Compared with control group, the UES length, resting pressure, relax pressure and relax rate in globus sensation group had not significantly different (P>0.05).

结果癔球症组UES长度、静息压、松弛压及松弛率与正常对照组比较均无显著差异（P >0 .0 5 ）。

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The length of pen is slightly greater than the width of the control box that it's resting against.

NPR: Memoir Offers an Inside Look at Autism