高中英语2025届高考词汇讲解系列（释义+例句）（O部共72个）.doc

高考英语词汇讲解O部1.obviously /ˈɒbviəsli/ [释义]In a way that is easily perceived or understood.[例句]Obviously, studying improves grades.显然，学习能提高成绩 2.occasion /əˈkeɪʒn/ [释义]A particular event or time.[例句]Birthdays are special occasions.生日是特殊的场合 3.occupation /ˌɒkjuˈpeɪʃn/ [释义] （1）A job or profession.（2）The act of occupying a place.[例句]Teaching is her occupation.教书是她的职业 4.occupy /ˈɒkjupaɪ/ [释义]To fill or take up space/time.[例句]The meeting occupied the entire morning.会议占用了整个上午 5.occur /əˈkɜːr/ [释义]To happen or take place.[例句]Accidents occur when we’re careless.事故在我们粗心时发生。

6.ocean /ˈəʊʃn/ [释义]A vast body of saltwater covering most of Earth.[例句]The Pacific Ocean is the largest on Earth.太平洋是地球上最大的海洋 7.o’clock /əˈklɒk/ [释义]Used to specify the hour when telling time.[例句]The train leaves at 3 o’clock.火车3点发车 8.October /ɒkˈtəʊbər/ [释义]The tenth month of the year.[例句]Halloween is on October 31st.万圣节在十月31日 9.odd /ɒd/ [释义] （1）Strange or unusual.（2）(Math) Not divisible by two.[例句]His odd behavior worried his friends.他古怪的行为让朋友担心 10.of /əv/ [释义]Expressing possession, origin, or relation.[例句]The color of the sky is blue.天空的颜色是蓝色。

11.off /ɒf/ [释义] （1）Away from a place.（2）Not operating or active.[例句]Turn off the lights before leaving.离开前关掉灯 12.offer /ˈɒfər/ [释义] （1）(V.) To present something for acceptance.（2）(N.) A proposal or bid.[例句]She offered to help with the project.她主动提出帮忙完成项目 13.office /ˈɒfɪs/ [释义]A room or building for administrative work.[例句]He works in a busy office downtown.他在市中心一间繁忙的办公室工作 14.officer /ˈɒfɪsər/ [释义] （1）A person holding a position of authority (e.g., police).（2）A member of the armed forces.[例句]The officer directed traffic after the accident.事故后，警官指挥交通。

15.official /əˈfɪʃl/ [释义] （1）(Adj.) Approved by authority.（2）(N.) A person in a position of authority.[例句]The official announcement will be made tomorrow.官方公告将于明天发布 16.often /ˈɒfn/ [释义]Frequently; many times.[例句]She often visits her grandparents.她经常去看望祖父母 17.oil /ɔɪl/ [释义]A viscous liquid used as fuel or lubricant.[例句]Olive oil is healthy for cooking.橄榄油对烹饪有益健康 18.OK /əʊˈkeɪ/ [释义] （1）(Adj.) Satisfactory or acceptable.（2）(Exclam.) Agreement.[例句]Is it OK if I borrow your pen? 我借你的笔可以吗？ 19.old /əʊld/ [释义]Having lived for a long time; not young.[例句]The old tree has stood for centuries.这棵老树已屹立数百年。

20.Olympics /əˈlɪmpɪks/ [释义]An international sports event held every four years.[例句]Athletes train for years to compete in the Olympics.运动员为参加奥运会训练多年 21.on /ɒn/ [释义] （1）In contact with a surface.（2）Operating or functioning.[例句]The book is on the table.书在桌子上 22.once /wʌns/ [释义] （1）(Adv.) On one occasion.（2）(Conj.) As soon as.[例句]Once you learn, you never forget.一旦学会，就永远不会忘记 23.one /wʌn/ [释义] （1）The number after zero.（2）Referring to a single person/thing.[例句]One step at a time leads to success.一步一个脚印走向成功。

24.onion /ˈʌnjən/ [释义]A round vegetable with layers and a strong smell.[例句]She chopped the onion and started cooking.她切了洋葱开始做饭 25.online /ˌɒnˈlaɪn/ [释义]Connected to or available via the internet.[例句]She shops online for convenience.她为方便在网上购物 26.only /ˈəʊnli/ [释义] （1）(Adj.) Sole; no one or nothing else.（2）(Adv.) No more than.[例句]This is the only copy left.这是唯一剩下的副本 27.onto /ˈɒntuː/ [释义]Moving to a position on top of something.[例句]The cat jumped onto the sofa.猫跳上了沙发 28.open /ˈəʊpən/ [释义] （1）(Adj.) Not closed or blocked.（2）(V.) To move something to allow access.[例句]The store is open from 9 AM to 5 PM.商店从上午9点到下午5点营业。

29.opera /ˈɒprə/ [释义]A dramatic art form combining music and theater.[例句]They attended an opera at the grand theater.他们在大剧院观看了一场歌剧 30.operation /ˌɒpəˈreɪʃn/ [释义] （1）The act of functioning or working.（2）A surgical procedure.[例句]The factory resumed operation after repairs.工厂维修后恢复运营 31.operator /ˈɒpəreɪtə/ n.操作员；经营者（a person who controls equipment/a business） Skilled operators ensure machines run smoothly and safely.熟练的操作员确保机器安全平稳运行 32.opinion /əˈpɪnjən/ n.观点（a personal belief or judgment） Respect others’ opinions while standing by your own values.尊重他人观点，同时坚守自己的价值观。

33.opponent /əˈpəʊnənt/ n.对手（a person who competes against another） A strong opponent pushes you to become better.强大的对手促使你进步 34.opportunity /ˌɒpəˈtjuːnəti/ n.机会（a favorable moment for action） Every challenge is an opportunity in disguise.每个挑战都是伪装的机会 35.oppose /əˈpəʊz/ v.反对（to resist or disagree with something） Oppose injustice with courage and reason.用勇气和理性对抗不公 36.opposite /ˈɒpəzɪt/ adj.相反的;n.对立物（completely different; counterpart） Opposite views can lead to balanced solutions.相反的观点能促成平衡的解决方案。

37.optimistic /ˌɒptɪˈmɪstɪk/ adj.乐观的（hopeful about the future） An optimistic attitude turns obstacles into s。