This is typically due to an uninhibited detrusor muscle that contracts randomly.

这通常是由于不受抑制肌随机收缩。

Whatever the mechanism, they found that the ant's jaw muscles had contracted so hard, they'd been irreparably damaged.

无论机制为何，他们发现，蚂蚁颚肌收缩得非常严重，已经受到了不可挽回损伤。

When the caudofemoralis retracts, it pulls backwards on the leg.

当股尾肌收缩时，会向后拉腿。

After the diaphragm contracts, it relaxes, thus decreasing thoracic volume and increasing intrapulmonary pressure.

膈肌收缩后，松弛，从而减少胸腔容积并增加肺内压力。

This is followed almost immediately by the sudden closure of the vocal cords and the opening between them, which is called the glottis.

几乎在膈肌收缩同时，两片声带就合拢，关闭们之间缝隙。也就是所谓声门。

It begins with an involuntary spasm or sudden contraction of the diaphragm, the large dome-shaped muscle below our lungs that we use to inhale air.

于一种无意识痉挛或膈肌收缩，膈肌是个大、圆顶形肌肉，位于肺下方，用于吸入空气。

And it causes an increase in parasympathetic stimulation and decrease in sympathetic stimulation which makes the detrusor muscle contract and the internal sphincter relax.

脊髓反射导致副交感神经兴奋，而交感神经兴奋受到抑制，造成肌收缩而内扩约肌松弛。

In a push-off stage, when the ball of your foot pushes off the ground, the quad muscle contracts which creates the force against the ground that propels you forward.

前进阶段，当脚跟离地面时，股四头肌收缩，在地面上产生推动我们前进力量。