HAfermentedbymicrobeswasamixture,butthebiolog icalrolesofHAarecorrelatedwithth,whichisoneofthelim iting‐factorstoextendtheapplicationsof‐containingbiomedicalprod ucts ﹒ So。Ithastheoreticalandpracticalvalu ─ Woruniformsize‐de finedHAbyindustrialfermentatio ......