So, this is a terrible form of diarrhea where you have to go up to 20 times a day, and these people have failed antibiotic therapy for two years before they're eligible for this trial.
这是一种很恐怖的腹泻， 患者每天要去将近20趟厕所， 而且这些人长达2年的抗体治疗 并未见效， 他们符合参与这项试验的要求。