牛馬羊等之所以吃草,取決定因素的是體內所分泌的酶,消化酶!
所有跟帖:
• 是啊。直接意義上的草,不包括穀物和蔬菜水果。 -TBz- ♂ (191 bytes) () 12/04/2016 postreply 11:11:20
• 是啊。直接意義上的草,不包括穀物和蔬菜水果。 -TBz- ♂ (191 bytes) () 12/04/2016 postreply 11:11:20
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