家禽 中国 省级 zhong guo jia qin shu yu sheng ji huan shi guo jia ji qi kan
中国 畜禽 种业 核心 zhong guo xu qin zhong ye za zhi shi bu shi he xin qi kan
中国 畜禽 种业 zhong guo xu qin zhong ye za zhi shi guo jia ji qi kan ma
三类 二类 四类 五类 qi kan yi lei er lei san lei si lei wu lei liu lei
分类 a lei b lei c lei qi kan fen lei