ordinary

a.普通的，平常的；平凡的

orchestra, orchestra pit, orchestra stalls (US orchestra), orchestral, orchestrate, orchestration, orchid, ordain, ordeal, order, order-book, order-form, order-paper, ordered, ordering, orderliness, orderly, ordinal, ordinance, ordinarily, ordinary level (also O level), ordinary seaman, ordination, ordnance, Ordnance Survey, ordure, ore, organ, organ-grinder, organ-loft, organdie (US also organdy), organic, organic chemistry, organically, organically-grown, organisation, organise, organism, organist, organization,