uncertain/ambiguous/arguable/equivocal/indefinite/vague.导航词义：不确定的

1. uncertain:adj. 不确定的；难预料的.指人对某事没有把握的，此时通常作表语；也指某事不明确的。

I am uncertain when he will come.

我不清楚他什么时候来。

He was uncertain about whether to buy the jacket.

他拿不定主意要不要买那件夹克。

It is uncertain whether she will win first place.

她是否会取得第一名还不太清楚。

His uncertain temper made him have few friends.

他的脾气令人捉摸不透，因而没什么朋友。

2. ambiguous:adj. 模棱两可的，不明确的.尤指可以理解为两种或更多意思，因而含糊不清、不明确的。

The minister's answer was highly ambiguous.

该部长的回答十分模棱两可。

Her role in the incident was ambiguous.

她在那次事件中的角色并不明确。

3. arguable:adj. 无把握的，有疑问的.指不确定某事是否为真实的或准确的。

Whether or not he can be elected (as) mayor is arguable.

他是否能被选为市长有待商榷。

It is arguable whether the meeting should have been delayed.

这个会议原本是否应该推迟还是个问题。

4. equivocal:adj. 模棱两可的，含糊的.指所给的信息、意见、答复等故意含糊其词的。

He was rather equivocal about his working experiences.

他谈到他的工作经历时有点含糊其词。

The answers given by the minister were always equivocal.

那位部长的回答总是模棱两可。

5. indefinite:adj. 模糊不清的，不明确的.指不确定的、不清楚的或没有明确定义或限定的。

an indefinite number of people

不确定的人数

These terminologies are so indefinite that they are confusing.

这些专门用语很不明确，令人费解。

6. vague:adj. 含糊的，不清楚的，不明确的.指提供的信息不够详细或表达的意思不够明确的，也指记忆等不清晰的。

The mayor gave only a vague outline of his employment plan.

市长只是含糊地大致说了一下他的劳动力就业计划。

The two students were vague about why they had been late.

对于为什么迟到，这两名学生含糊其词。

He had a vague recollection that he had put the key in the drawer.

他隐约记得自己把钥匙放在抽屉里了。

全部

1·The trial was adjourned for an indefinite period.

审判被无限期推迟。《柯林斯英汉双解大词典》

2·They seem determined to string the talks out for an indefinite period.

他们好像一心要把谈判无限期地拖下去。《牛津词典》

3·My heart was filled with puzzlement about the indefinite future and longing for the new life.

我的心对不确定的未来充满了困惑，渴望着新生活。

4·In English, a and an are called the indefinite article, and the is called the definite article.

在英语中，“a”和“an”被称为不定冠词，“the”被称为定冠词。

5·She will be away for the indefinite future.

她将离开一段时间，期限不定。《牛津词典》

6·For Groupon, that means an indefinite IPO delay.

对Groupon来说，它意味着IPO无限期延后。

7·Some think that doesn’t sound like an “indefinite” leave.

一些人认为这听起来不像是“无限期”离开的定义。

8·You can display indefinite progress bars by omitting the Max attribute.

忽略max属性，就可以显示无限的进度。

9·The Company shall exist for an indefinite term or until removed from the Register.

公司的存在无限期，直至从公司注册登记簿中注销为止。

10·Are you prepared to work long hours, every day, for an indefinite period of time?

你是否做好准备全天候，长时间工作的心理准备了吗？

不定

1·In English, a and an are called the indefinite article, and the is called the definite article.

在英语中，“a”和“an”被称为不定冠词，“the”被称为定冠词。

2·Then there will be an indefinite number of subsequent warnings, which will state that legal action will be taken if the account holder continues to download illegally.

接下来还会有不定数量的警告，这意味着如果此人继续非法下载，那么他将受到法律制裁。

3·We use indefinite pronouns to refer to people and things when we do not know or do not need to mention who or what we are talking about.

当我们不知道或没有必要说明所谈论的人是谁或是什么事物时，我们就用不定代词来指代人或物。

4·The way out of this, for those unwilling to invoke an intelligent creator, is to allow that the observable universe is just one of an indefinite number of universes, each with its own laws of physics.

对于那些不相信有智慧的造物主的物理学家而言，要解决这个让人百思不得其解的立论，就需要令现今人类可观测到的宇宙是不定数量数的宇宙(每个都有自己的物理法则)中的唯一一个。

5·Definite and indefinite articles are unaffected by gender (the actor, the actress; a bull, a cow.)

定冠词和不定冠词不受性别的影响(the actor, the actress； a bull, a cow)。

不确定的

1·My heart was filled with puzzlement about the indefinite future and longing for the new life.

我的心对不确定的未来充满了困惑，渴望着新生活。

2·If the number is huge or indefinite, a state machine is probably not the right approach.

如果数字很大或者不确定，则状态机也许不是正确的解决方法。

3·Among these factors there are not only random but also fuzzy indefinite factors.

指出其中不但存在随机因素，还存在有模糊不确定因素。

4·Maybe or perhaps is a very indefinite answer.

“可能”或“也许”是一个非常不确定的答案。

5·We use the present perfect tense to talk about something that happened at an indefinite time in the past.

我们使用现在完成时谈论发生在过去某个不确定的时间的事情。

无限的

1·You can display indefinite progress bars by omitting the Max attribute.

忽略max属性，就可以显示无限的进度。

2·For epistemology, human beings are being understood as a combination of indefinite and finite characteristics.

在认识论上，人的认识能力既是无限的，又是有限的。

3·Its application situation on heat shearing blade, guide plate and nodular indefinite chill roll are introduced too.

并阐述了这种焊条在热剪剪刃、机导板头、墨无限冷硬铸铁轧辊堆焊等方面的应用情况。

4·Effects of different tempering processes on surface microstructure of indefinite chill cast-iron roller were studied.

研究了回火工艺对无限冷硬轧辊表层基体组织的影响。

5·Each of the counterweights is formed of a bar element, having a constant section throughout most of its length and being obtained by cutting to size a bar of indefinite length.

对每个配重组成一个酒吧的环节，通过其大部分长度不变部分和被切割的大小有一个无限长的棒，获得。

模糊的

1·Today it's snowing, with wind enough to make all things beyond this desk an indefinite gray.

今天下着雪，风足以让这张书桌之外的所有东西都成为一种模糊的灰色。

2·Time is finite and infinite. I defy the indefinite definition.

时 间既是有限的又是无限的。我公然对抗这个模糊的定义。

3·For such purposes an indefinite and approximate measure of the intrinsic value may be sufficient.

目标是这个的话，对内在价值有一个模糊大概的估算就够了。

4·The Xijir Ulan tectonic melange belt is the western part of Xijr Ulan-Jinshajiang sutural zone, because study in low degree in the past, it is still indefinite.

西金乌兰构造混杂岩带为西金乌兰-金沙江缝合带的西端，由于以往研究程度低而认识较为模糊。

5·Time is finite and infinite. I defy the indefinite definition.

时间既是有限的又是无限的。我公然对抗这个模糊的定义。

(1)indefinite integral不定积分

(1)indefinite equation不定方程式