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or

美 [ɔr]
英 [ɔː(r)]
  • conj.或者;否则;不然;(用于否定句,提出两种或多种事物时)也不
  • n.【纹章】黑金色
  • prep.比…更早
  • 网络还是;或是;手术室(operating room)
Or
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conj.
1.
(用以引出另一种可能性)或,或者,还是used to introduce another possibility
Is your sister older or younger than you?
你有姐妹还是妹妹?
Are you coming or not?
你来还是不来?
Is it a boy or a girl?
是个男孩还是女孩?
It can be black, white or grey.
它可能是黑的、白的或灰的。
2.
(用于否定句,提出两种或多种事物时)也不used in negative sentences when mentioning two or more things
He can't read or write.
他不会读,不会写。
There are people without homes, jobs or family.
有人既无房屋,又无工作,又无家庭。
3.
(用于警告或忠告)否则,不然used to warn or advise sb that sth bad could happen; otherwise
Turn the heat down or it'll burn.
把炉火开小一些,不然就烧焦了。
4.
(用于两个数字之间表示约略数目)大约used between two numbers to show approximately how many
There were six or seven of us there.
我们约有六七个人在场。
5.
(用于引出解释性词语)或者说used to introduce a word or phrase that explains or means the same as another
geology, or the science of the earth's crust
地质学,或者说地壳的科学
It weighs a kilo, or just over two pounds.
这东西重一公斤,或者说两磅多一点儿。
6.
(用于说明原因)不然,否则used to say why sth must be true
He must like her, or he wouldn't keep calling her.
他一定喜欢她,不然他不会老给她打电话。
7.
(用于引出对比的概念)used to introduce a contrasting idea
He was lying─or was he?
他在说谎,还是没有说谎?

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