odds-on

adj better than even (chance); likely (to win) （可能性）较大的; 很可能（获胜）的: It's odds-on that he'll be late. 他多半得迟到. * That horse is the ,odds-on `favourite. 那匹马很有希望获胜.

octane, octane number (also `octane rating), octave, octavo, octet (also octette), October, octogenarian, octopus, ocular, oculist, odd, odd job man, odd jobs, odd-looking, oddball, oddity, oddly, oddment, oddness, odds, ode, odious, odiousness, odium, odometer, odor, odorous, odour, odour (US odor), odourless, odyssey, OECD, oecumenical, Oedipus complex, oesophagus (also esp US esophagus), oestrogen, of, of all time, of course, of importance,