single-arch的翻译

With the rapid development of economy highway traffic volume increases severely, single small cross-section tunnel cannot satisfy the requirements of highway traffic. In order to solve this problem effectively, large-span tunnel, for instance, single-arch four-lane road tunnel is constructed.

随着经济的快速发展，公路交通量猛烈增加，单个的小断面隧道已无法满足公路交通的需要，解决这个问题的方法之一就是修建多车道的大断面公路隧道，如：单拱四车道公路隧道。

Stone bridges consist of pillars, abutments and arches made up of stones held together by mortar. The arch bridges can be divided into the single-arch and the multi-arch varieties.

石桥由灰浆结合在一起的石头墩子、桥台和桥拱组成。拱桥可以分为单拱桥和多拱桥两种。

How to build safe, economical and practical single-arch four-lane road tunnels by using existing design theory and practical experience is a problem which the technological workers and engineers always concerned.

如何充分利用现有设计理论和实践经验，来建造经济、安全、实用的单拱四车道公路隧道是广大科技工作者和工程界人士所关心的问题。