单词	forepump
释义	forepump noun : a vacuum pump auxiliary to a more effective pump for which it supplies a first stage of exhaustion called also backing pump Word History Etymology fore- + pump
随便看	bogeymen bogeys bogfern boggards boggart boggarts bogged bogged (down) bogged down boggier boggiest bogginesses bogging bogging (down) bogging down boggle boggled bogglers boggles boggling boggy boghead boghead coal boghole bogie

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