求问句型It'samatterof...中的it指代什么?

Question

求问
句型 It's a matter of ...中的it指代什么?

Answer 1

不定向指代.可以指前面说的,或者是别的大家都了解的问题.
如：
It is a matter of fairness,but also ofefficiency.
这涉及到公平性问题,同时也是效率问题.
也可以说：this/that is a matter of
This is a matter of great concern.这受到极大关注的问题.
That is a matter of general interest.
那是大众都关心的事.