Harris says: "We can't say for certain."
哈里斯说：“我们说不准。”
I can't say for certain, but let's set up a phone interview for Monday.
我还不能完全确定，不过我们可以在周一进行一次电话面试。
But it is hard to say for certain these days what a World Expo is for.
但是，在当代，真的很难说清楚一届世博会举办的目的是什么。
No one can say for certain just how she survived the water and the wreckage around her.
没有人能说得清她如何从周围的洪水和废墟中死里逃生。
Administrators can't say for certain how many strangers have used the online classifieds site.
网站管理员们不能确定究竟有多少陌生客使用了这个在线分类广告网站。
I can't say for certain, but I think (have a feeling, have an idea) he might be from the States.
我不能肯定，但我觉得(猜想)他也许是从美国来吧。
We may find that we come across some photos that we cannot say for certain exactly which gull it is!
在图片中，我们可能发现碰到一些我们无法确认的个体！
How it became so intricately associated with moon worship and the Midautumn Festival — no one can say for certain.
至于月饼是如何辗转地与拜月和中秋节联系在一起的，还没有人能够说得清楚。
Neil adds that while multiple shifts are more the norm than the exception, he couldn't say for certain without formally researching the issue.
内尔补充说，频繁转换工作已经成为一种常态，在没有正式调查的情况下，他也无法说出确切的数字。
I might get up, but if I got up and looked at it, ten to one I shouldn't be able to say for certain; because once a thing's done, no one ever knows how it happened.
我本来可以站起来，但是，即使我站起身来瞧瞧它，十之八九我也说不出它到底是什么；因为一旦一件事发生以后，就没有人能知道它是怎么发生的了。
But other weight loss experts said the connection between cold temperatures and weight isn't yet very strong and they can't say for certain whether there's any association with obesity.
但是其他的减肥专家却说还没有发现低温和体重之间有太大的关系，他们也不确定这和肥胖是否有关系。
Experts cannot say for certain what is behind the shift, but several factors are likely to blame, including increased rates of obesity and environmental chemicals that mimic the effects of estrogen.
专家们现在不能确信是什么导致这种变化，但是包括不断增加的肥胖率和作用相当于雌激素的环境的化学物质的影响等一些因素可能是其中原因。
'MySpace doesn't set up something for you to create an introduction video, but kind of like a telephone answering machine, you assume a certain kind of voice and say certain things.'
MySpace网站上没有什么设置能让用户创建自我介绍视频内容，它就像一个电话语音应答机，用户用某种类型的声音说某些套话。
The best advice tends to be less certain - those researchers who say, 'I think maybe this is true in certain situations for some people.'
但最好的建议却往往不那么肯定-那些研究者会这样说：‘我觉得在某些情况对某些人这或许是可行的。’
Fly-by-night schools tend to share certain characteris-tics. For example, they may state that you can get a bache-lor's degree by paying, say, , a master's degree for , a doctorate for ,000.
野鸡大学往往有某些特征:例如,他们会说你交一笔钱,比如说5000美元,就可以得到学士学位,交7000美元可得到硕士学位,交10000美元得到博士学位。
No, if we admit that notion, then is there anything we can say we know for certain?
不，如果我们承认了这个观点，那是不是就没有任何东西可以说是我们确定认知的了？
Officials can't yet say how many farmers in the south-east have been forced into bankruptcy, but one thing is certain: the states have no spare cash for relief.
官员还不能确定究竟有多少农民在东南地区已遭遇破产，但值得肯定的是：这些州已没有多余的资金去实施救助。
One day she overheard him say he was on his way to the library for a certain book.
一天，她听到他和别人说要去图书馆借某本书。
For example, let's say that you're going to create filenames based on certain inputs from a user.
例如，我们假设您要基于用户的某个输入创建文件名。
Goldman Sachs for example pays out a certain amount in bonuses, and they say that employees get an average of $500, 000.
比方说，高盛（Goldman Sachs）支付一定金额的奖金之后，人们会说其雇员平均拿到了50万美元。
But, that's not to say that there isn't a certain recipe for success-in fact, we've mapped out a step-by-step guide to taking the style blogger world by storm AND rising to the top.
但这并不意味着你不能通过一定的方法获得成功——实际上，我们已经给出了一个按部就班的步骤，按照这个步骤来做，你就可以席卷博客世界，登上巅峰。
Now if you want to sign up for certain web sites, where you, say, have to put in your name and a password.
现在如果你想在某些网站注册，在那里你必须要填入你的名字和密码。
For example, if you enter a long trade and the prices continue to move up, then exit a portion, say 30%, of your position after prices reach a certain point.
例如，如果你开始了一个揸单，价格始终向上运动，然后到达一个特定位置后平仓一部分，可以是开仓金额的30%。
For example, let's say you're calling a bank to ask about a certain rate and then you discover later they misquoted you the information, you'd have a backup of your conversation as proof.
例如，假设你打电话询问银行一定比例，然后你发现后，他们错误地引述你的信息，你有你的谈话作为证据的备份。
They say China's actions will stimulate global markets for clean goods and services and harm exporters of coal and certain other raw materials.
他们表示中国的行动将刺激全球清洁产品和服务的市场，并将抑制煤炭等原材料的出口。
They say China's actions will stimulate global markets for clean goods and services and harm exporters of coal and certain other raw materials.
他们表示中国的行动将刺激全球清洁产品和服务的市场，并将抑制煤炭等原材料的出口。
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