停留在里面 meaning in Chinese

suspended within

Faecal material may get trapped in these pouches , which may lead to bacterial overgrowth and causes inflammation . if the thin lining of the pouch breaks , there may be abscess formation and peritonitis ( inflammation of lining of abdomen )
黏膜上会出现一个或多个小袋子，令粪便停留在里面及细菌滋生，可能引致发炎；如果黏膜穿破，亦可能引致脓疮和腹膜炎；长期的