in a way that is clearly separate from the rest or from other parts

In general, one can speak about the different elements of a song discretely (the chorus, the verse, the bridge). 一般来说，人们可以把一首歌的不同元素分开单独讨论（副歌、诗句、桥段等）。

He criticizes the idea that subject disciplines can be discretely identified and considered in isolation. 对于主体学科可以被分开识别和孤立考虑这种观点，他提出了批评。