on its own是什么意思？

Question

But this, on its own, is not enough for a university education.
整句句子的意思是：但是这些，对于大学教育来讲是不足的。我知道。
但是on its own是什么意思？

Answer 1

1. 就其本身而言
....(on its own) 就其本身而言...
2. 独立地，靠自己的力量
of your own free will自己自愿的...on its own独立地，靠自己的力量...自愿，自发

Answer 2

on its own 如果只靠他自己的话

Answer 3

感到孤独

Answer 4

就他自己而言

Answer 5

就它自己来说