Mister Rowan's reports on race relations in the South interested President John F.Kennedy.

VOA: special.2009.11.01

So, we can say that -- if we have neon here and we want to think about what's isoelectronic, -- f minus would be isoelectronic. We also have oxygen -- what would the charge on oxygen be? Um-hmm, right. 2 minus.

那么，我们可以说--如果我们这里有氖原子,而我们想知道与它等电子的是什么，负一价的氟离子就是与它等电子的，我们还有氧-,氧应该是几价的？没错，负二价。

麻省理工公开课 - 化学原理课程节选

That's true, but especially because of my parenthesization 32 over here, because I'm saying, "Do f minus 32, but then multiply it by the division on the left."

是那样的，但是特别地，因为我这里加上了括号,因为我指明，“f减去，然后它乘以左边的那个除法的结果“

哈佛公开课 - 计算机科学课程节选

John F.Kennedy, the country's first Roman Catholic president, is sixth on the list.

VOA: special.2009.02.27

Imagine I have a little lamp, a little goose- one of those little gooseneck lamps, I'd put it on the table here, I'd put the height about a f-- about a foot off the table. And if I was really good, - I could hit, or time it so that when I hurt- yeah, try again. When I turn this on switch on in the lamp, at exactly the same time, I'm going to hit a key on my computer and start it running.

想象下我有一个那种小雁颈台灯-,我把它放在桌子上，大概离桌子，有一英尺那么高吧,这样挺好的，我可以打开-,或者关闭这灯,并在这同时，我可以让我电脑,开始运行。

麻省理工公开课 - 计算机科学及编程导论课程节选

That same year, then President John F.Kennedy vowed in a speech before the U.S.Congress to put a man on the moon.

VOA: standard.2009.07.16

Your problem is to only look at the forces of contact on you, and that is just this f.

你只需要注意那些直接作用在这个物体上的力,那就只有 f 了

耶鲁公开课 - 基础物理课程节选

Grey Gardens,a story based on two eccentric relatives of the late Jackie Kennedy Onassis, widow of President John F.Kennedy, was named best television movie.

VOA: standard.2009.09.21

Depending on what F you fill in the blank with, what pet feature or fact you're trying to explain by appeal to the soul, you get a different argument.

根据你所挑选的不同功能特性F,以及你试图解释的现象或事实,诉诸于灵魂来进行解释,你会得到不同的论点

耶鲁公开课 - 死亡课程节选

The military is already shifting to a newer, slightly less sophisticated aircraft, the F-35 Joint Strike Fighter, designed more for attacking targets on the ground.

VOA: standard.2009.07.21

F = ma is universally true, independent of the nature of the force acting on a body.

= ma 是一条普适定律,与作用在物体上的力的属性无关

耶鲁公开课 - 基础物理课程节选

The only force acting on this guy is this little f.

这个物体只受一个力的作用,也就是 f

耶鲁公开课 - 基础物理课程节选

The free-body diagram, it says you can pick any one body that you like and apply F = ma to it, provided you identify all the forces acting on that body.

所谓隔离法,就是说你可以任意 选取一个物体,分析出它所受的所有力后,单独对其运用 F = ma 进行计算

耶鲁公开课 - 基础物理课程节选