No one seems to know for sure.
似乎没有人敢确定。
The only way to know for sure what will happen.
唯一的办法知道会发生什么。
I figured that would be the only way to know for sure.
我想这是知道真相的不二法门。
Well... they want me to, but it's too early to know for sure.
嗯…他们要我这样，但是现在还太早，难以肯定知道。
But it would be nice to know for sure which directory you're now in.
但确定您现在所处的目录还是不错的。
Finding out your community's rules is the only way to know for sure.
要肯定地知道唯一的方法就是查看你所在社区规定。
No one seems to know for sure what it was that everyone saw in the sky.
似乎没有人知道这是什么，每个人都看到天空中。
Sal: Hard to know for sure, but we believe in aloha 'aina: love of the land.
赛儿：确实很难讲，但是我们相信阿啰哈爱纳：对土地的热爱。
He went on to provide a few hypotheses, but said it's too early to know for sure.
他紧接着提出了几种假说，但是又说现在确定原因为时尚早。
The only way to know for sure is to wait and see, by which time it will be too late.
尽管气候变化也许不会变得象所有人说的那样糟，但一定会引起大量比现在更坏的后果。唯一可以确定的办法就是拭目以待，但到那时就太晚了。
Though it is hard to know for sure when these photos were taken, they were all released in the last seven days.
虽然当这组照片被公布时人们很难去判断它的真实性，但是在过去的七天里他们还是全都公之于众中。
There is no way to know for sure how well the last stimulus worked because we don’t know what would have happened without it.
没有确切衡量最后一次刺激计划成效的方法，因为我们不知道如果没有它的话会发生什么。
The only way to know for sure if chest pain is caused by heart disease is to be evaluated by a doctor and perform certain tests.
证实胸痛由心脏病引起的唯一确切途径就是通过医生诊断以及做相关检查。
He wants it acted upon, and the only way to know for sure if the whole plan was successful is when it is acted upon weeks or months later.
他还要对方按照这个意识去行动，而唯一确认整个计划是否成功的方法就是等它在数周或是数月以后产生效果。
The cause of that disaster has not been determined though, and it is impossible to know for sure whether the system could have prevented it.
尽管那次灾难的起因未有定论，并且也不可能确信系统是否能阻止灾难发生。
The hair in the stomach of the mountain lion he had killed matched the hair of the boy. The whole town was relieved to know for sure that the killer had been found .
这些猎人从大狮子胃里取出的毛发与男孩的头发相似，并告知整个镇子的人们确信已经找到了杀死大狮子的人。
In hindsight, it's hard to know for sure if the Turtles were like what Cavallo described or if they ultimately became like that as a result of their unique situation.
回头来看，很难肯定海龟们真的像卡瓦洛说的那样，或者是独特的环境真的让他们最终是那样的。
In any case, although it's impossible to know for sure, it seems likely that Neanderthals were sailors long before modern humans built their first sea faring vessels.
不论如何，尽管不能确定，但尼安得特人很可能在现代人造出第一艘船的很久之前，就已经航海出行了。
When they get to know me and to trust me, knowing for sure I'm not selling them something—there'll be more honest feedback from them.
当他们开始了解我、信任我，并确信我不是在卖什么东西给他们时，他们会给出更诚实的反馈。
This fear mechanism is critical to the survival of all animals, but no one can say for sure whether beasts other than humans know they're afraid.
这种恐惧机制对所有动物的生存都至关重要，但没有人能肯定人类以外的动物是否知道自己在恐惧。
If you know you're going to be out late, make sure you've got enough money for a taxi to get home again or arrange to stay with friends for the night.
如果你知道你会很晚才回家，确保你有足够的钱打车回家或者和朋友一起过夜。
One day, the cat's-meat-man said to him, "Why don't you stop being a doctor for people and become a doctor for animals instead? I'm sure that you know a lot about animals-more than most vets. You wrote a wonderful book about cats. I'd send all the people with sick dogs or cats to you."
一天，卖供猫食用的肉的商贩对他说：“你为什么不停止为人类看病，转而为动物看病呢？我相信你对动物的了解比大多数兽医还要多。你写了一本关于猫的好书。我会把所有带着生病的猫狗的人都送到你这里来。”
Try to imagine how they might respond - but remember it's impossible to really know for sure.
尝试设想他们可能有的反应-但是记得那是不可能完全肯定的知道。
Try to imagine how they might respond - but remember it's impossible to really know for sure.
尝试设想他们可能有的反应-但是记得那是不可能完全肯定的知道。
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