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单语范例（未经PONS编辑处理）
Its etymology is uncertain, but it may be a variation of doodlebug, a railroad term for certain types of small, self-propelled cars.
en.wikipedia.org The audience comes to realise that every move that the doodlebug makes the man reciprocates a second later.
en.wikipedia.org The engineer, conductor and a railroad employee managed to jump free, though they were badly injured; but no-one else on the doodlebug survived.
en.wikipedia.org It got knocked around a bit during the blitz and by doodlebugs.
www.independent.co.uk It is this ability which gives woodlice in this family their common name of pill bugs or roly polies, or doodlebugs.
en.wikipedia.org