英语词汇“pioneer tunnel”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	pioneer tunnel
释义	pioneer tunnel noun or pioneer bore : a small tunnel parallel to a main tunnel and well in advance of the completed main tunnel so that by crosscuts to the line of the main tunnel several headings can be exposed and work expedited
随便看	flirtable flirtation flirtatious flirtatiously flirtatiousness flirter flirt-gill flirt-gillian flirtigig flirtingly flirtish flirty flisk fliskmahoy flit Flit flit Flit flitch flitch flitch beam flitched flitched beam flitch girder flitch plate

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