translation.en: These were as essential to the success of the Roman Empire as the interstate highway system to the prosperity and development of the United States. Today, these roads that interconnect our world are dominated by cars and trucks that have remained largely unchanged for 100 years.
translation.zh: 这些东西是必不可少的， 对于罗马帝国的成就， 和作为州际公路系统 对于美国的 繁荣与发展。 今天，这些把我们的世界连接起来的道路 以汽车和卡车占主导地位， 这些东西在100年间在大体上 没有太大的改变。