We stopped at London Bridge, a double-arched formation whose outer span collapsed in 1990, stranding a couple on the other side so that they had to be rescued by helicopter.
我们在伦敦桥停下车来，这是一座双拱桥梁，外延部分在1990年垮塌了。 当时有一对男女被困在桥那一边，只能由直升飞机前来救援。
The paper discussed proportion between side span and middle span in three spans prestressed continuous box beam bridge.
本文对三跨预应力连续箱梁桥的边跨与中跨比例问题进行了初步的探讨。
Uncertain factors in construction of continuous girder bridge such as side span joint scheme and different balanced cantilever construction speed are analyzed.
对施工中的不确定因素，诸如边跨合拢方案和不同桥墩悬浇进度不一致等进行了分析比较。
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