求翻译：西班牙斗牛选用的公牛是一种血统纯正的野性动物，一般是生性暴烈的北非公牛，它们由特殊的驯养场负责牛种培育，经过四到五年即可用于比赛。但公牛那好斗的本性不是经人训练出来的，而是其天生的。其实斗牛选用的公牛都是色盲，所以无论你拿什么颜色的布去静止展现，斗牛都是没有感觉的，只有摇动的物体才能激起它们的斗志是什么意思？

Spain Bullfight Bullock is the selection of a lineage of pure wild animals, typically of recalcitrant North Africa Bull, specially responsible for the domestication of cattle rearing them, after 4-5 can be used for the game. But the bulls that aggressive nature not by people trained, but its born. Bull selection of bulls are colorblind, so no matter what color your cloth to still show, bullfights are not feeling, only shaking objects can stir up their fighting spirit