This experimentation used new biodegradable polymer Polylactide-Poly trimethylene carbonate(PLA-PTMC),in which we added in veterinary medicine Enrofloxacin,and made it to thinness test pieces and embedded it into muscle of rabbits, back bone,then we observing the speed of degradation、the effect to the growth of organization and the condition of delayed release medicine of these test pieces in vivo,and meanwhile we observing the speed of degradation、the condition of slow release drug of these test...