These enzymes are incapable of breaking down or digesting wool,hair or silk fibres which are to them indigestible protein.
These enzymes are incapable of breaking down or digesting wool,hair or silk fibres which are to them indigestible protein.
这些酶无法分解羊毛，动物毛发或丝等其它对于它们来说无法消化的纤维。