Digital technology has already rocked the media and retailing industries , just as cotton mills crushed hand looms and the model t put farriers out of work .

数码技术曾将给媒体业和零售业带来巨大冲击，就好比纺织厂让手工织布机退出舞台，t型发动机让蹄铁匠失业那样。

Roadbuilding became a far bigger business , whereas blacksmiths , farriers and buggy-whip makers faded away as america 's horse and mule population fell from 26m in 1915 to 3m in 1960 .

筑路成为了更大的行业，铁匠、马掌工和马车制造者却逐渐消失了，而美国马和骡子的数量从1915年的2600万跌至了1960年的300万。