The controlled use of fire allowed people to cook food and survive in colder climats 火的控制使用允许人们煮食物和在较冷的气候里生存
Fire provided light so that people could work and socialize for longer hours 火提供了光 所以 人们可以工作和社交更长的时间
With the invention of agriculture people could grow food and settle into communities随着农业的发明人们可以种植食物和定居在社区
By growing food ，people could spend less time hunting and more time for other things ，such as art 通过种植食物人们可以花费较少的时间打猎更多时间去做其它事情，例如艺术
The domestication of animals allowed people to raise and use animals for food and work动物的驯养允许人们饲养和利用动物作食物和工作
By raising herds of animals such as sheep humans had a reagular supply of meat and clothing通过饲养动物群例如羊群 人们定期获得大量的肉和衣物
The strength of animals such as horses and oxen was used for work and transportation 动物的强壮例如马和牛被用来工作和当作交通工具
The development of tools and machines has resulted in more efficient manufacturing and construction 工具和机器的发展导致更高效的制造和建造
With better tools and machines，work can be done with fewer people and at much lower costs 随着更好的工具和机器 工作能以更少的人更低的成本去完成
The development of science and engineering has improved many things including communications科学和工程学的发展已经改善了许多事情包括通讯
With an understanding of electricity ，telephones and radios allow people to communicate over long distances随着对电的理解，电话和收音机允许人们远距离交流
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