各位老师，原句是这样的：

the sector was expecting a decline in growth，but the actual reduction in postgraduate numbers is of real concern as international-students make up the majority of numbers in many postgraduate courses and research teams in science，technology，engineering and mathematics.

请问最后一部分（红色部分内容）修饰的是前面的postgraduate courses还是research teams呢？可以一起修饰他们两个名词吗？