So what makes this type of research special is that it's not just a matter of sending a questionnaire to the participants, instead the research is usually based on first-hand observation of what they are doing at the time.
这种研究与众不同之处就在于它不只是给参与
发一份调查问卷而已,而是通常根据对参与
当时做的事情进行的亲身观察来展开研究。