Occupational therapists help injured and sick people learn to do their day-to-day activities independently.

VOA: special.2011.01.23

You weren't sick that day, right? You were there.

回想一下，你那天没有不舒服，对吧。

麻省理工公开课 - 固态化学导论课程节选

Or they become sick for only a day or two.

VOA: special.2009.05.26