英语词汇“first arrival”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	first arrival
释义	first arrival first arrival [¦fərst ə′rī·vəl] (engineering) In exploration refraction seismology, the first seismic event recorded on a seismogram; it is noteworthy in that only first arrivals are considered in this usage.
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