problemas + girar en torno a

(n.) = problems + turn on, problems + revolve around

Ex. Not unlike several other institutions of higher education today, private universities find themselves beset with an array of problems, most of which turn on two closely linked axes: student enrollment is declining and costs are rising.

Ex. Many of the problems in children's reading, and much of the controversy over what should be stocked in children's libraries, revolve around the matter of choosing 'suitable' books for children of all ages.

* * *

(n.) = problems + turn on, problems + revolve around

Ex: Not unlike several other institutions of higher education today, private universities find themselves beset with an array of problems, most of which turn on two closely linked axes: student enrollment is declining and costs are rising.

Ex: Many of the problems in children's reading, and much of the controversy over what should be stocked in children's libraries, revolve around the matter of choosing 'suitable' books for children of all ages.