Yeah, I'm talking about pooping, or defecation.

是的，我说的是排便。

So we're talking about open defecation, this kind of situation.

所以我们会考虑露天排便。

It's no coincidence that many of our worst swear words involve defecation.

我们很多最难听的脏话都与排便有关，这绝非巧合。

Instead they often use unreliable, inadequate toilets or practise open defecation.

相反， 他们经常使用不可靠、不合适的厕所或露天排便。

Once the rectum is filled and stretched, signals travel to parasympathetic neurons in the spinal cord, initiating the defecation reflex.

当直肠被粪便填满并受到牵拉时，就会向脊髓内的副交感神经元发出信号，启动排便反射。

And here, special nerve receptors measure pressure, and when enough waste pushes against the rectum walls, it triggers the defecation reflex.

这里，特殊的神经感受器测量压力，当足够多的废物冲击直肠壁时，它会触发排便反射。

As urination and  defecation are natural, the medieval people had no shame in it.

由于排尿和排便是自然的，中世纪的人们对此并不感到羞耻。

Other symptoms of tetanus involve sympathetic over-activity, which causes drooling, excessive sweating, fever, difficulty swallowing, breathing problems, and irregular urination and defecation.

破伤风的其它临床表现包括：交感神经过度兴奋，引起流涎、大汗淋漓、发热、吞咽困难、呼吸困难，以及尿便失禁。

Here, special nerve receptors measure pressure, and when enough waste pushes against the rectum walls, it triggers the defecation reflex.

在这里， 特殊的神经感受器测量压力，当足够多的废物推到直肠壁时，它会触发排便反射。