Hi,
It explains why actual governance of USA seems to be much stronger when its economy superficially occupies only 27% of the world.
Does your answer 'No' means my sentence is not odd then? Yes, I meant your use of 'much stronger' is not odd.
I think the comparison in my sentence implies 'much stronger than it superficially is'. That meaning is not clear to me.
Actually, without a context the whole sentence is not very clear to me. Here are a few comments.
'Governance' is not a common word. Do you perhap mean 'government',? I would say 'the government', and I would omit 'actual'.
What does it mean to say that the USA's economy 'occupies' part of the world? And what does 'superficially' mean here? I think you need to state your meaning in another way, perhaps in other words.
Best wishes, Clive