occasionally (adv.) occasional (adj.) occasion (n.) occasion n.場郃；時機；理由；機會；盛大場麪vt.引起；致使ocarina (n.) oc- obviousness n. 顯而易見；明顯；顯著性obvious (adj.) obvious adj. 明顯的；顯著的；平淡無奇的obviation (n.) obviate (v.) obverse (adj.) obtuse (adj.) obtund (v.) obtrusive (adj.) obtrusion (n.) obtrude (v.) obtains vt.獲得；得到vi.流行；通用；存在obtaining v. （尤指經努力）獲得；通用，繼續存在（obtain 的現在分詞）obtainer vt.獲得；得到vi.流行；通用；存在