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词汇 dead reckoning
释义 dead reckoningn.(名词)
    1. Abbr. DRA method of estimating the position of an aircraft or a ship without astronomical observations, as by applying to a previously determined position the course and distance traveled since.缩写 DR船位推测法:一种推测飞机或船的位置的方法,不借助天文观察仪器,而通过从航行的方向和距离的精确位置来推算
    1. Predictive calculation based on inference; guesswork.推算;猜测:在推论基础上的论断性的计算;猜测
Etymology语源
    1. Possibly alteration of ded. 可能为 ded.的变化
    1. abbr. of deduced deduced的缩写
    1. from deduce [to trace from the beginning] * see deduce 源自 deduce [由开始探索] * 参见 deduce
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