连词

1. You may spend two or three days there.
你可以在那里待上两三天。

2. She studies biochemistry, or the science of life.
她学生物化学，也就是生命科学。

3. Mary never skis or skates.
玛丽从不滑雪，也不溜冰。

4. Make haste, or (else) you'll be late.
快点，要不然就来不及了。

5. Either you or I am to go.
你我之间总有一个人要去。

交通

B：It’s (faster/ slower/ more expensive) than taking the bus or the subway.
这比坐公车或搭地铁（快/慢/贵）。

A：Oh, o.k.
噢，好吧。

请求帮助

A：Excuse me; could you lend me some of your records?
打扰一下，请问您能借给我一些你的磁带吗？

B：Until when?
到什么时候？

A：Until Monday or Tuesday of next week.
到下周一或周二。

B：No problem.
没问题。

在商店

A：May I help you find something, or are you just looking?
要我帮您挑选点什么还是您自己先看看？

B：I’m just looking.
我就看一看。

A：Then. Take your time, please.
那请您慢慢看。

B：Thank you.
谢谢。

1. or.：opponents' runs; 对方得分数

2. or：option room; 手术室

3. or：optional research; 运筹学

4. or：odds-ratio; 比值比

5. or：odds ratios; or值

6. Boolean Search：Boolean operator || 布尔算子, 逻辑算子 | Boolean Search || 逻辑搜索, 一种用逻辑符号如AND,OR,NOT提取信息的方法 | Boolean secondary || 布尔二次式

1. （连接两个或两个以上选择的可能性）或，或者，还是
You use or to link two or more alternatives.

e.g. 'Tea or coffee?' John asked...
“喝茶还是喝咖啡？”约翰问道。
e.g. Was she blonde or brunette?...
她的头发是金色还是深褐色？

2. （与 either 或 whether 连用，给出另一个选择项）或，还是，就是
You use or to give another alternative, when the first alternative is introduced by 'either' or 'whether'.

e.g. Items like bread, milk and meat were either unavailable or could be obtained only on the black market...
像面包、牛奶和肉之类的东西要么是买不到，要么就是只能去黑市买。
e.g. Either you can talk to him, or I will...
要么你跟他谈，要么我去。

noun

1. a room in a hospital equipped for the performance of surgical operations

e.g. great care is taken to keep the operating rooms aseptic

Synonym: operating roomoperating theateroperating theatresurgery

2. a state in northwestern United States on the Pacific

Synonym: OregonBeaver State