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- The reasons why widening the structure gauges of rectangular tunnel on transition curve will lead to the increase of cost in civil engineering of metro tunnel are analyzed. 分析因地铁缓和曲线段矩形隧道建筑限界的加宽而导致地铁隧道土建投资增加的原因;
- To reduce the cost, calculation methods of how to widen the structure gauges of rectangular tunnel on transition curve are recommended and compared by case study. 为节省投资，介绍缓和曲线地段的建筑限界加宽方法及特殊情形的计算方法，并通过实例进行比较。
- When frequency slightly higher than cutoff, using perturbation method it is to know that tunnel wall wet make attenuation of electromagnetic wave lower not only in rectangular tunnel but also in circular tunnel. 当频率略高于隧道截止频率时利用微扰法可知：不论是矩形隧道还是圆形隧道，隧道壁潮湿使电磁波的衰减率降低。
- In order to solve the problem of cutoff frequency of rectangular ridged waveguide,effects of trains on cutoff frequency in rectangular tunnel are analyzed by using ridged waveguides method. 为求解矩形正脊波导的截止频率问题,把求解矿井隧道中存在列车时的电磁波传播特性问题归结为求解矩形正脊波导截止频率的问题。
- A fork waveguide model is proposed and the mode matching and multi-mode network technique are used to analyze the transmission characteristics of rectangular tunnel with metallic pit prop. 针对矩形巷道中由于金属支护立柱的存在而带来的分叉不连续问题,提出用分叉波导模型并用模式匹配法和多模传输理论分析传输特性。
- Transverse dimensions of rectangular tunnels have great influence on electromagnetic waves propagation. 摘要矩形巷道截面尺寸对电磁波的传播特性有很大的影响。
- Effects of trains on cutoff frequency in rectangular tunnel 矩形隧道中的列车对电磁波截止频率的影响
- Based on the radio waves propagation models of circular tunnels and rectangular tunnels, the relation between attenuation and conductivity is analyzed and the concept of conductivity breakpoint is presented. 根据圆形巷道和矩形巷道的电波传播模型，分析了电波衰减率和电导率的关系，并且提出了电导率断点的概念。
- They are building a submarine cable tunnel. 他们正在建设一条海底电缆隧道。
- I put a rectangular box on the table. 我把一个长方形的盒子放在桌子上。
- They are digging through the hill to make a tunnel. 他们正在凿山建一条隧道。
- The kid dug a tunnel in the sand. 小孩在沙堆里挖了一个地道。
- The two lanes merge going into the tunnel. 两条车道会合后引入隧道。
- The truck cleared the tunnel safely. 卡车安全地通过了隧道。
- He has to stoop to get through the tunnel. 他得弯下腰走过地道。
- A rectangular house of one story; a ranch house. 牧屋单层的长方形房屋; 牧屋
- The roar of the train reverberated in the tunnel. 火车的轰隆声在隧道里回荡。
- The prisoner escaped by digging an underground tunnel. 囚犯挖了一条地道逃跑了。
- Effects of the metallic pit prop on the electromagnetic wave cutoff frequency in the rectangular tunnel 矩形隧道中的金属支护立柱对电磁波截止频率的影响
- A pillar, rectangular in cross section, supporting an arch or roof. 支柱交叉处的长方形柱子，支撑一个拱顶或屋顶
