总部设在联合王国诺丁汉的英国地质勘探局的一位地震专家Richard Luckett说,从1751年以来,这个体系从来没有发生过类似强度的地面震动。
That system has not produced a quake of similar magnitude since 1751, says Richard Luckett, a seismologist at the British Geological Survey, which is headquartered near Nottingham, UK.
不过航空运输延迟和低效的主要原因还是过时的空中交通管制——一套依靠地面控制、反应迟缓的雷达站和不断重复的语音通讯建立起来的体系。
But delays and inefficiencies in air travel are due in large part to an outdated traffic-control system that still relies on slow, ground-based radar stations and repetitive voice communication.
基于军事卫星应用系统对地面战场的作战保障,建立其作战效能评估指标体系;
Based on military satellites application system's battle guarantee Which is given to ground war field, its battle efficiency evaluation index system is set up.
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