几千年来，他们开始减少对野外狩猎和采集的依赖，而更多地依靠自己饲养的动物和播种的庄稼。
Over thousands of years, they began to depend less on what could be hunted or gathered from the wild, and more on animals they had raised and crops they had sown.
已经采取措施让饲养动物者了解他们申请执照的权利了吗？
Have steps been taken to acquaint breeders with their right to apply for licenses?
当他们开始定居、种植作物和饲养动物时，他们对复杂数字系统的需求变大。
As they began to settle, grow plants and herd animals, the need for a sophisticated number system became paramount.
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