various people have to come along and fill in the gaps between the bumps
Ah yes, the underpaid overworked summer students.
s/summer students/grad students/g
or
s/summer students/postdocs/g
or
s/summer students/full-time research staff/g
Of course, with all the Ph.D.s creating little bumps all over the place, various people have to come along and fill in the gaps between the bumps. They don't get enough credit.