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。
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。
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。
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。
Harris says: "We can't say for certain."
哈里斯说：“我们说不准。”
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。
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。
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。
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。
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。
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