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	jeremiah jeremian jeremianic jerez jerfalcon jerican jericho jerk jerk jerk around jerked jerker jerkily jerkin jerkin jerkiness jerking jerking jerkingly jerkinhead jerk line jerk-off jerk off jerk pump jerks

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