If your child regresses to babyish behaviour, all you know for certain is that the child is under stress.
如果你的孩子退步到幼稚的行为，你可以肯定的是孩子正处在压力之下。
I don't know for certain why Carl Dadisman, the owner, wouldn't stop Daddy from sitting down.
我不知道出于什么原因，卡尔·达迪斯曼——这家店的店主——并不阻止爸爸坐下。
I know for certain that miracles happen, but only for those who hang on to hope.
我确信世上有奇迹，但奇迹只会发生在抱持希望的人身上。
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？
The truth is we can't ever know for certain what other people are thinking about us.
而事实是我们无法确知他人是如何看待我们的。
We don't know for certain. But what might have happened to lead to the two different editions?
我们不能确切知道，但可能发生过什么，导致了这两个不同版本？
Amid all the rumor, speculation and nonsense, only you know for certain what you think and feel.
在各种流言、猜测和无稽之谈中，只有你了解自己的真实想法和感受。
But we are not going to know for certain which approach makes sense until additional data is in.
但是我们不会知晓到底哪个方法行得通，直到获取了额外的数据。
I know for certain that my character and faith have been shaped and molded by my mom, Corabelle.
我很清楚自己的品格与信仰深受母亲的影响。
But more research needs to be done before we know for certain that TwHF extract works and is safe.
不过，在我们确切地了解雷公藤提取物有效而且安全之前，还需要进行更多的研究。
I feel I've made good progress, but I don't know for certain whether or not I'm past the hump here.
到目前为止我觉得已经取得了很大的进展，我不知道我是否已经度过了最困难的事情。
However, there have been individual positive and negative studies, so it's difficult to know for certain.
然而，有个别肯定和否定研究，这对确切了解是有困难的。
If your child regresses to babyish behavior, all you know for certain is that the child is under stress.
如果你的孩子退步到幼稚的行为，你可以肯定的是孩子正处在压力之下。
When the rain is pouring down and my heart is hurting, you will always be around, this I know for certain.
当大雨倾盆而下，我的心受到伤害，你总会在我身旁，我深深知道这一点。
To know for certain whether praying for romantic partners strengthened relationships, they needed to go further.
想要确定是否“替情侣祈祷”真能加强情侣关系，他们还需要更进一步的实验。
The tough part about being an officer is that the troops don't know what they want, but they know for certain what they don't want.
作为军官最辛劳的一点是：士兵不知道他们想要什么，只知道他们不想要什么。
And the scientific method, with its laborious procedures and peer review, ensures we won't know for certain in the foreseeable future.
科学方法，因为其复杂的程序和需要同行互相验证，使我们无法在可预见的未来获得确切的答案。
What I do know for certain, however, is that one night, a night when he and I both needed it most, I made him laugh, and that makes me proud.
我只知道一件事：那就是今晚，是我们俩都最需要的一个晚上，我让他笑了出来，而那使我骄傲。
"We cannot know for certain how fairly our ancestors in foraging bands behaved," but the findings "bring us a closer understanding," she wrote.
“我们不能肯定我们的祖先在觅食团体中的行为多么公平”，但这些发现“使我们能进一步了解，”她写道。
We cannot know for certain that more wealth and better health directly lead to higher self-esteem, but it does appear to be linked in some way.
我们还不能肯定，为什么更多的财富和更好的健康，会直接导致他们有着较高的自尊心。但它们之间似乎存在有着某种联系。
When you can count around a hundred or more as per the sighting recently in Mexico, you will know for certain that their origin is not from the Earth.
当你们能够计算出的几百甚至更多的飞船最近在墨西哥被目击的这个事件，你将清楚的知道它们决不是来自地球的。
If you're really worried about finishing last, choose a short fun run or charity race that's walker-friendly so you know for certain that they'll be walkers in the race.
如果你实在是担心会是最后一个，那就去跑一个短距离的不是太正式的比赛，或者那种接受全程步行的慈善短跑比赛。里面肯定会有走路的人，这样你就能放心了。
Imagine if cars didn't come equipped with any gauges, drivers would never know for certain whether they were going to run out of gas, overheat or get stopped for speeding.
如果汽车没有任何仪表板，驾驶员就无法知道车是否会没油、是否过热或超速。
Then the Lord said to him, "Know for certain that your descendants will be strangers in a country not their own, and they will be enslaved and mistreated four hundred years.
耶和华对亚伯兰说：“你要的确知道，你的后裔必寄居别人的地，又服事那地的人；那地的人要苦待他们四百年。
It is possible that Jerry had a congenital anomaly in his bronchial tree that led to the pooling of mucus, and eventually to infection, but it is impossible to know for certain.
Jerry有可能是先天性支气管异常导致粘液的蓄积导致最终感染，但很难验证这种情况。
It is possible that Jerry had a congenital anomaly in his bronchial tree that led to the pooling of mucus, and eventually to infection, but it is impossible to know for certain.
Jerry有可能是先天性支气管异常导致粘液的蓄积导致最终感染，但很难验证这种情况。
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