不起眼: unremarkable, nothing out of the ordinary...
怕: to be afraid, to fear...
灰尘: dust...
劣势: inferior, disadvantaged...
日常: daily, everyday...
进来: to come in...
乐趣: delight, pleasure, joy...
缝合: to sew together, suture (in surgery), to sew up (a wound)...
牵涉: to involve, implicated...
讲座: a course of lectures...