certain的读音是：英['s??tn]。certain的词语用法是adj.(形容词)certain的基本意思是“确信无疑的”或“毋庸置疑的”,即“肯定的,确信的”,在句中常用作表语。其后可接动词不定式,表示“相信(某人)会做某事”。certain【近义词】absolute。
一、详尽释义点此查看certain的详细内容
二、双解释义
三、词典解释
肯定（BEING SURE）
1.肯定的;有把握的;毫无疑问的
If you arecertain about something, you firmly believe it is true and have no doubt about it. If you are notcertain about something, you do not have definite knowledge about it.
e.g. She's absolutelycertain she's going to make it in the world...
她坚信自己会出人头地。
e.g. We are notcertain whether the appendix had already burst or not...
我们不敢肯定阑尾是否已经破裂。
2.必然的;必定的;肯定的
If you say that something iscertain to happen, you mean that it will definitely happen.
e.g. However, the scheme iscertain to meet opposition from fishermen's leaders...
然而，这项计划一定会遭到渔民领袖的反对。
e.g. It's notcertain they'll accept the Front's candidate if he wins...
即便来自阵线的候选人获胜，他们能否接受他还说不准。
3.确凿的；无疑的
If you say that something iscertain, you firmly believe that it is true, or have definite knowledge about it.
e.g. One thing iscertain, both have the utmost respect for each other...
有一点可以肯定，那就是双方都非常尊重对方。
e.g. It iscertain that Rodney arrived the previous day.
罗德尼肯定是头天到的。
4.确实的;肯定的
If you havecertain knowledge, you know that a particular thing is true.
e.g. He had been there four times to mycertain knowledge.
我确定他去过那儿4次。
5.确切地;无疑地
If you know somethingfor certain, you have no doubt at all about it.
e.g. She couldn't know what time he'd go, or even forcertain that he'd go at all...
她不知道他何时走，就连他到底走不走都说不准。
e.g. Hill had to find out forcertain.
希尔得弄个清楚。
6.确保；保证
If youmake certain that something is the way you want or expect it to be, you take action to ensure that it is.
e.g. Firstly, they must makecertain that their pension needs are adequately catered for...
首先，他们得确保他们能获得足够的养老金。
e.g. To make extracertain, a police helicopter kept watch from the skies.
为确保万无一失，一架警用直升机一直在空中警戒。
表示数量（REFERRING AND INDICATING AMOUNT）
1.某个;特定的
You usecertain to indicate that you are referring to one particular thing, person, or group, although you are not saying exactly which it is.
e.g. There will becertain people who'll say 'I told you so!'...
一定有人会说：“我怎么跟你说来着！”
e.g. You owe acertain person a sum of money...
你欠某人一笔钱。
2.某些;一些
When you refer tocertain of a group of people or things, you are referring to some particular members of that group.
certain
e.g. They'll have to give up completely oncertain of their studies.
他们将不得不彻底放弃某些研究。
3.(用于人名前，表示不认识或了解很少)某个
You can usea certain before the name of a person in order to indicate that you do not know the person or anything else about them.
certain的反义词
e.g. She managed to arrange for them to be hidden in the house of acertain Father Boduen.
她设法安排他们藏在一个叫博迪恩的神父家里。
4.(品质、特点等)一定程度上的，有点儿
You usea certain to indicate that something such as a quality or condition exists, and often to suggest that it is not great in amount or degree.
e.g. That was the very reason why he felt acertain bitterness...
那就是为什么他感到有些痛苦。
e.g. There is acertain impatience among some of the soldiers...
有些士兵有点儿不耐烦。
四、例句
It's certain that every effect must have a cause.
无疑，每个结果必定有其原因。
I can tell you for certain that I am always honest.
我可以肯定地告诉你, 我一向是老实的。
Certain things are still open to discussion.
有些事还需要商量。
A certain man will visit you tomorrow.
明天某人将探访你。
For certain reasons I will be unable to attend the meeting.
因为某种原因，我不能出席这次会议。
A certain Mr Brown telephoned while you were out.
你出去的时候
To a certain extent, I'm in favor of your project.
从某种程度上说,我赞成你的方案。
There was a certain coldness in her attitude towards me.
她对我的态度有点儿冷淡。
Certain of those present had had too much to drink.
有些出席的人喝得太多了。
五、常见句型
六、情景对话
了解海关手续
A：You've traveled abroad a lot, Jim, so would you like to tell me something about clearing customs.
吉姆，你经常出国旅游，能向我介绍一下关于通关的情况吗？
certain的意思
B：When you arrive in a country, you clear customs. A lot of countries have two channels: the green channel and the red channel. Some countries, like India, have three channels: the white channel, the green channel and the red channel.
到达一个国家时要通关。许多国家的海关有两种通道：绿色通道和红色通道。还有些国家如印度有三种通道：白色通道、绿色通道和红色通道。
certain的近义词
A：Then what are the differences between the green channel and red channel?
那么绿色通道和红色通道之间有什么区别呢？
B：If you have more than the duty-free allowances or prohibited goods, you go through the red channel and declare them to a customs officer. If you otherwise have nothing to declare, you go straight through the green channel unless you are asked to stop by an officer. 如果你携带的东西超出免税的范围或属于禁带物品，你
就得从红色通道通过并向海关申报物品。如果你没有需要申报的物品而海关又没有阻拦你，你就可以直接通过绿色通道了。
A：I see.I'm told that we'll have to state the purpose of going to acertain country, is it true?
我明白了。我听说去一个国家时需要陈述旅行的目的，是吗？
B：That's right. People go aboard for different purposes: some for pleasure, some on vacation, some on business, and some for other purposes.
是的。人们出国都各有目的：有的为了消遣，有的出去度假，有的是因公出差，有的是为了其他目的。
certain的意思
A：I'm going to New Zealand for sightseeing. What should I say if they ask about my purpose?
我要去新西兰观光，如果他们问我旅行的目的我该怎么说呢？
certain是什么意思
B：Just saying "sightseeing" is OK.
说"观光"就行了。
七、词义辨析
certain的相关近义词
absolute、confident、convinced、express、particular、positive、reliable、settled、special、sure
certain的相关反义词
disputable、doubtful、questionable、uncertain、unclear、unconvinced、unfounded、unlikely、unreliable、unsettled、unsure
certain的相关临近词
certainly、cert、Certaines、certain of、Certain tea、certainness、certain fee、certain jet、certain rate、certain size、certain-ty、certain list