ore

n.矿石，矿砂

ordain, ordeal, order, order-book, order-form, order-paper, ordered, ordering, orderliness, orderly, ordinal, ordinance, ordinarily, ordinary, ordinary level (also O level), ordinary seaman, ordination, ordnance, Ordnance Survey, ordure, organ, organ-grinder, organ-loft, organdie (US also organdy), organic, organic chemistry, organically, organically-grown, organisation, organise, organism, organist, organization, organization, organisation, organizational, organizational, organisational, organize, organize, organise, organized, organised, organizer, organiser,