摘要
自从人类开始将自己及自己的物品从一个地方移动到另一个地方，桥梁就一直存在了。早期的桥梁工程师所能做的仅仅是砍倒一棵树，将其架在峡谷或溪流之上，但是很快他们就发现，通过在桥梁架构上花费更多的时间和精力，他们可以跨越更大的距离，运送更重的货物。下面让我们纵览一些现代最让人叹为观止的桥梁建筑。
Bridges have been around ever since humans began to move themselves--and their goods--from one place to another. Early bridge engineers had to do little more than fell a tree across a ravine ravine or stream, but they soon discovered that they could span greater distances and haul heavier loads by putting more time and energy into their structures. What follows is a survey of some of the most breathtaking bridges of the modern era.
