European Union chief diplomat Javier Solana, who has represented the P5+1 in dealings with Iran, has contacted the office of Iranian nuclear negotiator Saeed Jalili to arrange a meeting.

VOA: standard.2009.09.11

Three plus five. I can take something to a power, double star, just take three to the fifth power.

+5，我也可以,求一个数的次方，例如求3的5次方。

麻省理工公开课 - 计算机科学及编程导论课程节选

First of all, it's clear from the Pythagoras' theorem that a is the square root of ^2 + ^2.

首先,根据毕达哥拉斯定理,勾股定理在西方被称为"毕达哥拉斯定理"

耶鲁公开课 - 基础物理课程节选

The P5+1 last year presented Iran with a revised offer of incentives for it to halt a uranium enrichment effort U.S.and European officials believe is weapons-related and return to negotiations on its nuclear program.

VOA: standard.2009.06.24

So if we have total +2 and complete shielding -1 where that can actually negate a full positive charge, because remember our nucleus is plus 2, +1 one of the electrons is minus 1, so if it totally blocks it, all we would have left from the nucleus is an effective charge of plus 1.

抵消一个完全的正电荷,因为记住我们的原子核是,其中一个电子是,所以如果它完全挡住了它，我们从原子核中留下的，全部有效电荷就是，所以，在我们的第一个例子中,我们的第一种极端情况。

麻省理工公开课 - 化学原理课程节选

As reported contemporaneously in 2000,the number was -3.1% but if you look at the number reported for 2005, because bad records had disappeared and good records had been added, all of a sudden the average experience for that year went up to +1.2%.

000年期的公告中这个数字为负3.1%,但是如果你去查2005年公告的数字,坏记录已经调整而消失,有利的投资记录被加入,转瞬之间,年平均收益升至1.2%

耶鲁公开课 - 金融市场课程节选

See, I've defined f of x to be a function x=x+1 that takes a value of x in, changes x to x+1, x and then just returns the value.

我定义了f是一个函数,输入x，让，然后输出。

麻省理工公开课 - 计算机科学及编程导论课程节选

One thing I can guarantee from past experience in this class, is that the median grade will be a B+.

不过从教学经验看,中间成绩应该是B+

耶鲁公开课 - 博弈论课程节选

Because the B+ or A- people, B- you know it, they'll hire B's and B minuses.

原本想要B+或者A-的人，实际能力评分只有B或者。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

You can verify, in this simple example, that A + B is the same as B + A.

在这个例子中还可以验证,A + B = B + A

耶鲁公开课 - 基础物理课程节选

I personally don't like swings that much and it's the B-/B+ range, so I'd much rather prefer that to a swing from A to C, and that's my reason.

我不喜欢成绩波动很大的,比如B-/B+这个范围,所以我还是喜欢像A到C这样小点的,这就是我的原因

耶鲁公开课 - 博弈论课程节选

If you are describing a particle with location R, the vector we use typically to locate a particle, R then R is just i times x + j times y, because you all know that's x and that's y.

如果你要描述一个位移为 R 的质点,这个矢量一般用表示质点 R 的位移,R 可表示为 i ? x + j ? y,显然你们都知道这段是 x,那段是 y

耶鲁公开课 - 基础物理课程节选

Then, to find the meaning of b, we take one derivative of this, dx/dt, that's velocity as a function of time, and if you took the derivative of this guy, you will find as at+b. That's the velocity of the object.

接下来,为了弄清b的含义,我们取它的一阶导数,dx/dt,得到速度作为时间的函数,如果你对它求导的话,你会得到at+b,这就是物体的速度

耶鲁公开课 - 基础物理课程节选