并且对城市环路建设的作用，分期实施的必要性，高架路在环路中的地位进行了探讨。
It also discusses function of city circular road construction, the necessity of performing by stages and the station of viaduct in circular road.
本文结合FIDIC合同条件在北京四环路建设中的实际运用，就北京城市道路建设运用FIDIC的有关问题作一探讨。
Associated with the factual applications of FIDIC contract condition in the building of Beijing Fourth Circle Road some problems about how to use FIDIC are studied in the paper.
到目前为止，世界范围内的PSTN供应商已经投入了巨大的成本，包括建设、维护骨干网和用户环路。
Up to now, PSTN providers have invested a lot of costs in building and maintaining their bone networks and subscribers cycle circuit.
到目前为止，世界范围内的PSTN供应商已经投入了巨大的成本，包括建设、维护骨干网和用户环路。
Up to now, PSTN providers have invested a lot of costs in building and maintaining their bone networks and subscribers cycle circuit.
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