How to pronounce “sublinear” in English

That's the sublinear, the 3/4.

This is called sublinear scaling.

Just like biology, it's sublinear.

I didn't emphasize this, but going along with that sublinear scaling is that the pace of life systematically slows.

Now what causes the difference, why are cities superlinear and companies are sublinear?

If it's less than one, like the surface law, that is called sublinear scaling.