现将世界桥梁的规模按跨度分类,用下表列出已有的和即将完成的长大桥梁70座。附图是按这些桥的修建年代绘制的。从此可以看出,很多长大桥是近20年修建的。 Now that the size of the world’s bridges is broken down by span, use the table below to list 70 existing and near completed bridges. The drawings are based on the years of construction of these bridges. It can be seen from this that many long bridges were built in the past 20 years.