求翻译：被调查者包括了本科生、硕士生以及博士生。从上图可以看出被调查者主要集中于大二年级，占总比例的70.93%，研究生、博士生一共有2.9%，出行方式的分析主要体现出南京四所大学本科生的出行方式特点。是什么意思？

Respondents including undergraduate, graduate and doctoral students. From the chart we can see that respondents focused on the sophomore year, accounting for 70.93% of the total proportion of graduate students, doctoral students a total of 2.9 percent, the analysis of the way to travel is mainly ref

The respondents include the undergraduate, master's and doctoral students. Can be seen from the Drawing respondents primarily concentrated in the big 2, and grade of the total percentage of 70.93 % and graduate students, and doctoral students a total 2.9 % of the way to travel, and analysis of major

Has been included the undergraduate student, the master's degree student as well as the postgraduate candidate by the surveyor.May see from on chart by the surveyor is mainly concentrated in the big second year, accounts for the total proportion 70.93%, the graduate student, the postgraduate candida

Respondents include undergraduate, master's and doctoral students. You can see from figure on respondents mainly in the sophomore year, the total proportion of 70.93%, graduate students, doctoral students a total of 2.9%, mobility analysis of major reflects the mobility characteristics of the Nanjin

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