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	excarnation excavate excavated excavates excavating excavation excavational excavations excavator excavators excavatory heterozygosity heterozygote heterozygotes heterozygous hetest heth heths hetman hetmanate hetmanates hetmans hetmanships Hetrazan hets

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