However,this is more difficult because it is harder to control the diets of people and because they live longer than other animals.
VOA: special.2009.09.01
Several large animal species had disappeared so people had to find other animals and so this changed from going to find animals to domesticating animals, and shift from collection of plants to production of plants.
很多大型动物物种已经灭绝了,人类不得不去寻找其他动物,因此这也就完成了从狩猎到驯养的转变,从采集到种植的飞跃
They say there are other reasons why the large animals and people from that period disappeared.
VOA: special.2009.01.20
应用推荐