Because of its good performances, fiber Raman amplifier is one of the key techniques to build long-span unrepeatered communication system.
光纤拉曼放大器由于其优良的性能,是构建长跨距无中继光纤传输系统的关键技术之一。
Design and Analysis of Fiber Raman Amplifiers in Long-Span Unrepeatered Systems;
长跨距无中继系统中光纤拉曼放大器的设计与分析
Equipment Configuration and Optical Amplifier Module Analysis for Long-span Unrepeatered Optical-fiber Communication Systems
长跨距无中继光纤通信系统设备配置与光放大单元分析
Design of 2.5Gbit/s Unrepeatered Long-Span Optical Fiber Communication Systems;
2.5Gbit/s无中继长跨距光纤通信系统的设计
Unrepeated optical fiber transmission over 507 km long haul
507km超长站距无中继光传输系统
Considering such a long span
就如此长的跨距而言
long span cable-supported bridge
长跨距悬吊体系桥梁
Study on Optimization Design of Relay-Pump Stations in Long-Distance Hot Water Network for Urban Central Heating;
长距离城市集中热水供热管网中继泵站设置优化设计研究
short-range pick-up television relay equipment
近距离电视中继装置
Energy-Balanced Relaying Communication Protocol Based on Power and Distance Cooperation for Wireless Sensor Networks;
基于能量均衡与距离协同中继的无线传感器网络通信协议
A Research on the Design and Realization of the RFID System Working at 13.56MHz;
中频长距离无线识别技术研究及系统设计实现
Wider spans are more economical and better for the navigation of shipping than shorter ones between piers with deep foundations penetrating the bed of the waterway.
与在河道下深打桥墩基础的短跨距相比,长跨距对航运更好更经济。
A Research on the Distance of Going Up or Down and the Swing Leg Motion in the Striding Hurdles Pace;
跨栏步中起跨距离和下栏距离及摆动腿动作的研究
a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length.
电离层中的一层，距地面至英里处，反射中等波长的无线电波。
The furthest distance in the world is not the distance between two trees, but the branches cannot depend on each other in wind even they grow from the same root.
世界上最远的距离，不是树与树的距离，而是同根生长的树枝，却无法在风中相依。
Wavelet Denoising Applied in Multi-Span Nonlinear Fiber Links
多跨距非线性光纤链路中的小波去噪
To Study of Construction Management System Model for An Inter-Basin Long Distance Water Transfer Projects;
跨流域长距离调水工程建设管理体制模式研究
On the flat, there are sprints, middle distance races and long distance races.
平跑项目有短跑、中距离跑和长距离跑。
medium-, and long-distance events,
中程和长距离的比赛，