In this sentence,it could be explained like that(While S V)in English.But accurately speaking,it means during the time when I'm not aware of in Chines(grammatically).But you could understand it like that (While S V). In general, 在~中 has several explanations.It could refer to a limit of location,time,range and so forth.Well,it depends. For instance, 在家中 means at home(a limit of location) 在上班中 means at work/at the time of working Hope this won't make you feel confused.

你中文不错哦

Thank you, all! It is so fun to learn Chinese＼(^o^)／

yes, 在〜中 = while

Here is the link of the English translation of the song. http://www.hjenglish.com/music/p397324/