defecate [ˈdefəkeɪt]

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v.澄清，净化；排粪，通大便

to pass the contents of the bowels out of the body

Animals defecate after every meal.动物每次进食后都会排粪。
Newborn puppies must be stimulated to defecate and urinate after each feeding.幼犬每次进食后需要被刺激排便。