The United States national soccer team accomplished what few believed they could Wednesday night in Bloemfontein, dominating the world's number one ranked team and leaving the stadium with a merited 2-0 victory and a ticket to the final of the Confederations Cup on Sunday night in Johannesburg.

VOA: standard.2009.06.24

What's the biggest number I can represent with eight of these? Somebody?

我能用这8个数最大表示多少？,有人知道吗？

麻省理工公开课 - 计算机科学及编程导论课程节选

So our last question we ask is what's the total number of photons emitted if we give this given intensity for 60 seconds?

最好的问题是如果我们,按照给定的强度照射60秒,那么总的光子数是多少？

麻省理工公开课 - 化学原理课程节选

All I have to do then is correct that for the number of days in a year, so that's what I did.

接下来我只需要将它换算成年,我就是这么做的

耶鲁公开课 - 金融市场课程节选

The other obvious one to do would be worst case. Again, over all possible inputs to this function, what's the most number of steps it takes to do the computation?

很明显另一种就是针对最坏的情况了,也就是在所有可能的输入,里面选出用的,步骤最多的那个输入？

麻省理工公开课 - 计算机科学及编程导论课程节选

The absolute number that you assign to it is something that's arbitrary. You have to set what the zero is. And so there's a well-understood convention for what the zero is.

你指定给它的绝对值是有任意性的,你需要设定零点的位置,因此有一个经过充分研究的,关于设定零点的约定。

麻省理工公开课 - 热力学与动力学课程节选

And so what's the biggest possible number you can represent, give or take, with 32 bits?

所以它可以表示的最大的数值是多少呢,大概是多少？用32位表示？

哈佛公开课 - 计算机科学课程节选

The difference the real difference is in what genes its expressing of the total number of genes in the human genome and therefore if it's expressing these unique this unique set of genes.

真正的不同之处是,在这些细胞中,表达的是人类全部基因中的不同基因,因此如果细胞表达的是,这组独特的基因

耶鲁公开课 - 生物医学工程探索课程节选

If you want to know what the number c is, you say, let's put time t=0.

比如,如果你想知道系数c代表的是什么,我们令时间t=0

耶鲁公开课 - 基础物理课程节选

Well, let's do the smoke test number one: is the mean more or less what we expected?

好了，让我们先做1号发烟测试：,这个平均值是和我们想要的答案差不多吗？

麻省理工公开课 - 计算机科学及编程导论课程节选

So, if we want to figure out the formal charge on the carbon, we need to take the number of valence electrons, so that's 4. We need to subtract the lone pair, what number is that? It's 2.

如果我们想算出碳原子的形式电荷，我们需要将价电子的个数，也就是四，减去孤对电子的个数，它是多少？是二。

麻省理工公开课 - 化学原理课程节选

What's the biggest number you can represent with three decimal digits? Pardon?

你们想用这3个十进制数表示什么？,请再说一遍？

麻省理工公开课 - 计算机科学及编程导论课程节选

So here we have that graphed here, Z we have atomic number z graphed against ionization energy, so, let's fill in what the actual atoms are here, and we can see in general, yes, we're following the trend.

这就是我们要画的，横坐标是原子序数，纵坐标是电离能，让我们把真正的原子填上去，我们可以看出，总体来说，没错，满足规律。

麻省理工公开课 - 化学原理课程节选

But it's positive 1.5% per year, time-weighted--that's the number that you see in the prospectus or the number that you see in the advertisements so you say, what's the big deal, no harm no foul.

但算下来回报率每年还是正的1.5%,时间加权回报率,是你在招股说明书中,或是在广告中会看到的数字,你会说,没什么大不了,既没损失,也不违法

耶鲁公开课 - 金融市场课程节选

Well, maybe this ended up at location 7, 8, 7 8 9 9 so what's really in x is the number 7, 8, 9, which is the address in memory, but again, uninteresting.

嗯，可能这个在地址7，8，9结束，那么在x中实际上是数字，那是内存中的地址，但是，那是没有什么用的。

哈佛公开课 - 计算机科学课程节选

So, now we have said go to the address stored in X, which is who knows, it's over there, put the number 42 there so what I've just drawn is this part of this story here.

那么，现在我们指明定位到存储在x中的地址，那就是把数字42放在那里,我所画的就是这一部分。

哈佛公开课 - 计算机科学课程节选

And just to plant this seed with 32 bits, what's the biggest number you can represent?

而对于32比特，所能表示的最大的数是多少？

哈佛公开课 - 计算机科学课程节选

And what he came out with when he did some calculations is that there's the radius that he could calculate was equal to this number a sub nought, which is what we call the Bohr radius, and it turns out that the Bohr radius happens to be the radius most probable for a hydrogen atom.

等于这个a0的值,我们叫它波尔半径，而,波尔半径恰好是,最容易，找到电子的地方，我们对波尔模型,不做过多的解释,这是因为。

麻省理工公开课 - 化学原理课程节选