But we are not going to know for certain which approach makes sense until additional data is in."

VOA: standard.2010.07.16

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？

麻省理工公开课 - 媒体、教育、市场课程节选

I think maybe for, you know, certain, maybe sort of older ladies who have sort of big hats,

我想可能有个别年迈的女人会有那样的大帽子，

英国皇家赛马会 - SpeakingMax英语口语达人

Today we know, for example, if you can put one certain kind of element in your mouth or eat that, it doesn't necessarily mean you want to put the element next to it and your mouth as well, that might not be safe.

现在我们知道了，比如，即使你能把某一种元素放进嘴里,或者吃下去，这也并不一定意味着,你会把它邻近的元素也吃进嘴里,这可能会有危险，但。

麻省理工公开课 - 化学原理课程节选

A lot of what we know ultimately about fat in the diet and risk for heart disease, risks for cancer from certain sort of diets, the protective effect of certain diets comes from studies that rely on just the kind of assessment that you guys just did.

我们最终了解的许多关于饮食中的脂肪,以及对心脏患病风险,一些特定饮食中存在的致癌风险,以及特定饮食中的保护作用的研究,都是以你们所做的这种评估为根据的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And you can find these compressibility factors in tables. If you want to know the compressibility factors for water, for steam, at a certain pressure and temperature, you go to a table and you find it.

各种气体的压缩系数,想知道水或者水蒸气,在某个温度和压强下的，压缩系数，查表就行了，这是实际气体状态方程的。

麻省理工公开课 - 热力学与动力学课程节选

We know pain is--of others is aversive for chimpanzees and we know this in certain ways.

我们知道黑猩猩也讨厌其他黑猩猩的痛苦,这是非常确定的。

耶鲁公开课 - 心理学导论课程节选