2025届高考英语词汇讲解系列（释义+例句） （O部，共72个）清单

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/