The base of the enrolment ratio in many middle - income and low - income countries is still quite low . there is still room and therefore pressure for it to increase , albeit at a slower pace than in the last few decades 在很多中等收入和低收入的国家，大学收生率的基数还比较小，尽管相对于过去数十年的情形，扩展的速度将会放缓，但仍然有空间和有压力需要发展。
