Defense Secretary Robert Gates' has now visited Iraq 10 times since he took office in 2006, and this is his second since the June 30 U.S.pullout from Iraqi towns and cities.

VOA: standard.2009.07.28

And then we have c, the speed of light, 2.998 times 10 to the 8 meters per second.

然后我们知道光速等于，2，998乘以10的8次方米每秒。

麻省理工公开课 - 化学原理课程节选

And then I could put a couple of plates and I could raster the beam so that when I am looking here,the beam goes back and forth about 80 times a second.

然后我放了两个感光片,我可以检测到光束所以,当我观察时,电子束以每秒80次的速度来来回回了。

麻省理工公开课 - 固态化学导论课程节选

"Here's an example of one relatively small part of the brain that's doing three very different things at three different times, but all within the space of a quarter of a second,".

VOA: standard.2010.01.15

So, keep in mind that one milliwatt is just the same as saying 1 times 10 to the -3 joules per second.

所以，请记住1毫瓦,和1乘以10的-3次方焦耳每秒,的说法是等同的。

麻省理工公开课 - 化学原理课程节选

Sahin says researchers increasingly realize that individual parts of the brain have multiple functions." because here's an example of one relatively small part of the brain that's doing three very different things at three different times, but all within the space of a quarter of a second,"

VOA: standard.2010.01.28

Frequencies, how many times you go around, f is revolutions per second It's called the angle of velocity.

频率就是一秒转多少圈,因为 f 是每秒转过的圈数,这就是角速度

耶鲁公开课 - 基础物理课程节选

You don't mind watch it a second time Actually I watched it many times, on DVD in particular. Did you use the DVD?

你们不介意再看第二遍吧,事实上我看了很多遍，特别是看DVD，你们看DVD吗？

麻省理工公开课 - 电影哲学课程节选

You get 2.18 times 10 to the plus 6 meters per second, 1% which is about 1% of the value of the speed of light.

。18*10^6米每秒，得到的速度大概是光速的。

麻省理工公开课 - 固态化学导论课程节选

So, if we do this calculation for an electron, saying it moves at 10 to the 5 meters per second, then what we end up with for a wavelength is 7 times 10 to the -9 meters.

如果我们已知电子以，10的5次方每秒的速度运动，那么做一个计算,可以得知它的波长是,7乘以10的负9次方米。

麻省理工公开课 - 化学原理课程节选

Mathematically complete problem is that you can find the function x of t by saying that the second derivative of the function is equal to -k over m times the function.

这个数学问题就是,你可以求出函数 x,只要令函数的二阶导数,等于 -k 除以 m 再乘以函数

耶鲁公开课 - 基础物理课程节选