Most American colleges and universities use the grading system of A,B,C,D and F.

VOA: special.2009.03.05

f What about 2? d, and 3? Yup, so 3 is f.

嗯，3是。

麻省理工公开课 - 化学原理课程节选

We now live in the internet age and so Regulation F.D.

而我们现在已经进入全新的互联网时代

耶鲁公开课 - 金融市场课程节选

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

So they began to call this A and this B and this C and this D and this E, this F, this G.

他们开始把这叫做A,B和C,这个是D,E,F,G

耶鲁公开课 - 聆听音乐课程节选

I need to now put this float somewhere, and I'll put it in a variable called f that you can call it whatever you'd like.

我现在需要把这个浮点数放在哪个地方，然后我把它放在,一个叫做f的变量里,你也可以给这个变量取其它的你喜欢的名字。

哈佛公开课 - 计算机科学课程节选

Let me go ahead and call print F. I'm going to say A equals A and then I need a percent D, backslash, comma A; so this is a little bit of -- more syntax than would be nice, %d but I'm just saying, literally, A equals percent D, and I'm plugging in the value of A for percent D.

我们继续调用printf，我说明A等于,然后我需要%d，反斜杠n，逗号;,所以这个有点--偏向逻辑的，而不偏向美观的，但是我刚说了，字面上，A等于，我用%d插入了A的值。

哈佛公开课 - 计算机科学课程节选