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 economic climate remains uncertain.

经济气候依然是不确定。《柯林斯英汉双解大词典》

2·Oh yes, was the faint, uncertain reply.

“哦，是的。”这是她虚弱且不确定的回答。

3·Over that length of time, forecasts become more uncertain.

在那段时间里，预测变得更加不确定。

4·That the evidence was inconclusive, the science uncertain?

这种理论缺乏决定性证据，就连科学也不能确定。

5·But for the most part, these benefits seem thin, uncertain, and far off.

但在大多数情况下，这些好处似乎是微乎其微的、不确定的以及遥远的。

6·Their origin is uncertain, but archaeologists hypothesize that they were Canaanites.

他们的起源是不确定的，但考古学家推测他们是迦南人。

7·Nowadays, we rely on news for information, but we are uncertain about the truth of the news.

如今，我们依靠新闻获取信息，但我们却不确定新闻的真实性。

8·It's uncertain whether English will be the world language in the future, but we should still keep learning.

未来英语是否会成为世界语言还不确定，但是我们也应该努力学习。

9·Management is all about making difficult tradeoffs in conditions that are always uncertain and often fast-changing.

管理就是在不确定且经常快速变化的条件下做出艰难的权衡。

10·In spite of all that has been said, quite a lot of people are still uncertain about the prices of housing in China.

尽管已经说了很多，有很多人对于中国的房价仍然不敢确定。

不确定的

1·The economic climate remains uncertain.

经济气候依然是不确定。《柯林斯英汉双解大词典》

2·Over that length of time, forecasts become more uncertain.

在那段时间里，预测变得更加不确定。

3·But for the most part, these benefits seem thin, uncertain, and far off.

但在大多数情况下，这些好处似乎是微乎其微的、不确定的以及遥远的。

4·Their origin is uncertain, but archaeologists hypothesize that they were Canaanites.

他们的起源是不确定的，但考古学家推测他们是迦南人。

5·Management is all about making difficult tradeoffs in conditions that are always uncertain and often fast-changing.

管理就是在不确定且经常快速变化的条件下做出艰难的权衡。

不明朗

1·Scientists believe water activity affected this plateau after the formation of the nearby canyons. Although the source of water and sediment remains uncertain.

科学家相信，在附近峡谷形成之前这片高原受到过水的影响，虽然水源和泥沙的问题仍不明朗。

2·Green Construction and Zero Energy homes are now coming of age in a very uncertain and unstable economic climate.

在极其不明朗、极其不稳定的经济形势中，绿色建筑和零能耗住宅正在日趋成熟。

3·The overall regional outlook remains uncertain and the strength of the recovery will largely depend on demand from key export markets.

整个地区的前景仍然不明朗，经济复苏的强度将在很大程度上取决于主要出口市场的需求。

4·Companies have also been buying up francs to pay two months of salary before the uncertain election period.

在不明朗的选举期到来前，公司也购进用以支付两个月工资的法郎。

5·The outcome of the accident was still uncertain, but Thornburgh and Carter knew that their appearance might boost local morale.

事故结果当时尚不明朗，但索恩·伯勒和卡特明白，他们的到访会激励当地民众。

不定的

1·A DECADE ago, after European activists whipped up lots of negative coverage about the perils of toying with nature, the future of genetically modified (GM) crops seemed uncertain.

十年前，欧洲活跃分子挑起大量负面报道，讲述戏弄自然的危害，自那以后，转基因作物的未来似乎变得飘忽不定。

2·The Pope also spoke of his concerns in what he called these uncertain times of tension and conflict.

教皇同时也对目前这种紧张和冲突的令人心神不定的时代表示担忧。

3·This makes the inflation outlook uncertain, helping gold and hurting currencies like the dollar.

这使得通胀前景不定，从而对黄金有利，而不利于美元等货币。

4·The costs will be high, the outcome uncertain.

成本高昂，结果不定。

5·That also is uncertain. Maybe in 5 days, or dozen.

童子曰：归期亦不定，或三五日，或十数日。

未知数

1·But how exactly it happens after that is still uncertain.

但在这以后，具体情况会怎么样，目前仍是未知数。

2·But although these three organisations are well funded for the next few years, the long-term viability of philanthropic funding is still uncertain.

尽管这三家机构在未来的几年里经费充足，但是否有长期慈善基金供应仍是未知数。

3·Having said that, the stability and reliability of this technology is still uncertain.

说了这么多，稳定性和可靠性，这一技术仍是未知数。

4·All of the future and me, is a more uncertain, I can guess, but I always end Caibu Chu, in the end that I should not continue to go so?

一切的未来对与我来说多是一个未知数，我可以猜出开始，我却始终猜不出结局，我到底该不该继续这么下去？

5·However, experts point out that the disappearance of HIV patients is not known yet, whether by bone marrow transplantation in the treatment of AIDS is still uncertain.

但专家指出这名患者艾滋病病毒消失的原因尚未确定，究竟能否用骨髓移植治疗艾滋病还是未知数。

无法确定的

1·While this book is very well-organized as a reference, a good number of the descriptions left me uncertain about occasional subtleties of the language.

虽然作为参考这本书组织得很好，但有许多描述仍让我无法确定语言中那些偶尔的微妙之处。

2·But this primary is being held under new rules, so the outcome is uncertain.

然而，由于本次预选是在新规定下举行，所以结果怎样还无法确定。

3·Their difficult partnership weaves yet another strand into the drama of the euro, adding to the uncertain future of the eu itself.

他们捉摸不定的伙伴关系，还因为欧元的介入，让欧盟的未来更加无法确定。

4·Finally, still uncertain of what to do, I set a March 1 deadline to announce my decision.

我最终还是无法确定自己该不该参选，便把3月1日作为宣布决定的最后期限。

5·Companies will not increase production or build new capacity while the state of future aggregate demand remains uncertain.

如果国家未来的需求总量仍然无法确定，企业就不会增加生产，或是新产能。

无常

1·Climate change is complicated and uncertain, but, as our survey this week explains, the underlying calculation is fairly straightforward.

尽管气候变化复杂无常，但从我们本周的调查研究来看，得到的计算结果却相当明确。

2·Life is uncertain, the only unchanged is changing.

生活是无常的，唯一不变的是永远在变。

3·Most of my life is spent with people, and people are so uncertain and unpredictable. I like the regularity or the predictability of the clock.

我大半生与人打交道，深知人性的反复无常和捉摸不透。我喜欢钟表的规律性和可预知性。

4·At this altitude, the air is very thin and the weather is uncertain. So the climbing is very difficult.

在这样高度上，空气十分稀薄，气候变幻无常，因此攀登非常困难。

5·And after ten years, where will I put this uncertain life jigsaw puzzle together?

而十年以后，又会在哪和谁一起拼砌这无常的人生？

渺茫

1·As uncertain as I was at first, I still took deep pride in the tender shoots that confidently sprang up and thrived because of my care, because of my nurturing.

像开始一样的渺茫，对那些满怀自信蓬勃生长的嫩苗，我为自己的培育和照顾仍然感到深深的自豪。

2·Walked, the destiny only left behind bunch of uncertain light to the dream, I could do only strive for more light, reflected its shadow.

走了，命运只给梦想留下一束渺茫的光了，我唯一能做的就是争取更多的光，折射出它的影子。

3·Human hope to get some release from dull, inflexible, uncertain future, depressed and sorrowful life.

人们指望能从单调刻板、前途渺茫、愁苦暗淡的生活中得到一些解脱。

4·Nokia's path is certain pain followed by an uncertain future.

诺基亚的前进道路上必然荆棘丛生，前途渺茫。

5·Whether hasn't the day gray wild boundless this year's hope too uncertain gulf bay road long money's day too long building high person hasty accompanied tonight with you snatches the bank?

天苍苍野茫茫今年的希望太渺茫水湾湾路长长没钱的日子太漫长楼高高人忙忙今夜能否与你结伴抢银行？

靠不住的

1·Some people really shine in their social web participation and companies often see increased social networking and engagement by individuals as an uncertain area.

有些人在参与社交网络活动时非常突出，但公司却常常会认为个人的社交网络与社交活动是靠不住的。

2·Critics of climate research argue the data are incomplete, the climate modelling uncertain, the predictions inconclusive.

气候研究批评家们认为数据不完备，气候模型靠不住，预测不确定。

3·Strauss-Kahn said today the fund’s forecast for a recovery to start in 2010 is “very uncertain.”

Strauss-Kahn今天表示该基金（指IMF——译注）2010年开始复苏的预测“非常靠不住。”

4·The most uncertain link in the new allied chain was Russia.

新同盟体系最靠不住的是俄国。

5·Ten minutes, ten days. A month. What an uncertain husband I have been, Clare, like a sailor, Odysseus alone and buffeted by tall waves, sometimes wily and sometimes just a plaything of the gods.

克莱尔，一直以来，我是个靠不住的丈夫，像个海员，像是那独自一人去远航的奥德赛，在高耸的海浪里饱受蹂躏，有时是狡诈的诡计，有时只是众神灵的小把戏。

未确定

1·Some nine campaigners—the figure is still uncertain—aboard a Turkish steamer were shot dead when Israeli commandos descending from helicopters boarded the ship in international waters.

据估计一艘土耳其轮船上的出征者大约有9名--具体人数至今仍未确定---被乘坐直升机从天而降、登上甲板的以军突击队员枪杀。

2·Our holiday plans are still uncertain.

我们的度假计划仍未确定。

3·In West Africa, elephants live in both forest and savanna areas, but their taxonomic status remains uncertain.

在西非，大象即可生存在森林中，也可生存在稀树大草原地区，但它们的分类学属性仍未确定。

4·Because of this, it is still uncertain who invented TV.

正因为此，至今还未确定是谁发明了电视。

(1)uncertain about对…不能肯定