So they have had really loose stools recently.

他们最近大便很稀。

Sometimes what you're getting is loose stool that just gets around the hard stool, but you're not really removing the hard stool in the rectum.

有时你得到的是松散的粪便，只是绕过硬粪便，但你并没有真正去除直肠中的硬便。

A second episode of loose stool was reported overnight; a sample of this stool was collected for rRT-PCR testing, along with additional respiratory specimens (nasopharyngeal and oropharyngeal) and serum.

隔夜报告了第二次稀便； 收集了该粪便样本用于 rRT-PCR 检测， 以及其他呼吸道标本（鼻咽和口咽）和血清。