orientation

n.定方向；认识环境

organisation, organise, organism, organist, organization, organization, organisation, organizational, organizational, organisational, organize, organize, organise, organized, organised, organizer, organiser, orgasm, orgiastic, orgy, oriel, orient, oriental, orientalist, orientate, orienteering, orifice, origin, original, original sin, originality, originally, originate, originator, oriole, ormolu, ornament, ornamental, ornamentation, ornate, ornately, ornateness, ornithological, ornithologist, ornithology,