The F-22 is what experts call an "air superiority" fighter, designed to defeat enemy jets in mid-air battles.

VOA: standard.2009.07.21

In this case, I'm going to get back the answer 3 F-O-O because the user typed in F-O-O, but wait a minute, what's with this?

假若这样，我得到了答案3,因为用户输入了，等一下，用这个干吗？

哈佛公开课 - 计算机科学课程节选

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

His comments reflected what other officials have said that ending the F-22 program is just one part of the effort to shift the focus of U.S.defenses away from what they see as the relatively remote possibility of a war with a major power and toward the types of smaller-scale conflicts of recent years.

VOA: standard.2009.07.21

It is. It's drawn like an array, it effectively is an array so bracket zero means go to the zero's location in that array, which happens to be F and do what with it?

它看起来像个数组，实际上也是一个数组,所以【0】就是定位到那个数组的0的存储单元，对于f发生了什么？用它做什么？

哈佛公开课 - 计算机科学课程节选

Now, the crucial question, of course, is, "What's the relevant feature F?"

但关键问题是,那个相关的特性F是什么

耶鲁公开课 - 死亡课程节选

What's the difference between saying F = -kx and F = ma?

= -kx 与 F = ma 的区别在哪里

耶鲁公开课 - 基础物理课程节选

But if you avoid all of these minutia and focus really just on the idea, it looks like what was a blue say block, a so called statement, is now going to be something called printf where the F happens to stand for formatted.

但是如果你抛开所有这些繁琐的细节，把注意力集中到,它的编程思想，那么它只不过一个蓝色的say程序块，是一个声明,即所谓的printf函数，其中的f是,用于格式化输出。

哈佛公开课 - 计算机科学课程节选

For an f orbital, what is the quantum number l equal to?

对于一个，f，轨道，它的角量子数，l，等于几？

麻省理工公开课 - 化学原理课程节选

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

Just iterates from zero to Arg C. The indented line here print F is clearly printing a string, as per the percent S, but what is it printing?

只是从零开始迭代,到ArgC，这个缩进行printf显然是打印一个字符串,就像每一个%s，它在打印什么呢？

哈佛公开课 - 计算机科学课程节选