In particular,in Africa, you'd be worried about things like H.I.V.

VOA: special.2009.08.03

Now, I hope you guys know that much calculus, that when you take a derivative of a function of a function, namely v square over 2 is a function of v, and v itself is a function of t, then the rule for taking the derivative is first take the v derivative of this object, then take the d by dt of t, which is this one.

我希望你们了解更多的微积分知识,当你对复合函数求导时,也就是说v^/2是关于v的函数,而v本身是关于t的函数,求导的法则应该是,第一步是这一部分对v求导,然后v再对t求导,得到这一部分

耶鲁公开课 - 基础物理课程节选

D-A-V-I-D I'm not hardcoding in D-A-V-I-D anymore but I can still use a variable.

我不再把名字写死为,而是用一个变量来代替。

哈佛公开课 - 计算机科学课程节选

On Monday,Washington,D.C., health officials reported shocking information about H.I.V.

VOA: special.2009.03.20

Now you have to know from elementary calculus that v times dv/dt is really d by dt of v square over 2.

根据初等微积分知识你们得知道,v乘以dv/dt其实就是d/2)/dt

耶鲁公开课 - 基础物理课程节选

D-A-V-I-D Well, if I've got a five-letter word like D-A-V-I-D, well, that's like five bytes and yet we only have the ability thus far in this class to return one thing at a time I can't return five bytes to you, but wait a minute, those bytes by nature of a computer are just stored in RAM.

好的，如果有5个字母的单词，如，那是5个字节,我们只能返回一个东西,而不能返回5个字节，等一下，这些字节被计算机本能地,存储在内存中。

哈佛公开课 - 计算机科学课程节选

5 So similarly would there be the number 65 next to this then the corresponding number for V-I-D and then there's generally a special character at the end that looks like a zero that says end of string here.

同样，A就是,接着再填上V-I-D对应的ASCII码,在最后还有添上一个特殊的字符,有点像0，代表这是该字符串结束。

哈佛公开课 - 计算机科学课程节选

D-A-V-I-D So when you get a string like D-A-V-I-D, what's really happening is inside your computer's RAM is going a byte where there's some zeros and ones.

譬如你有这么一个字符串，而在你电脑的RAM里将会变成,一个个由0和1组成的字节。

哈佛公开课 - 计算机科学课程节选

So I just have to see, oh, here's a D, let me keep looking, D here's an A, keep looking here's a V, here's an I, here's a D and yet, and this is one tidbit we introduced a week or so ago, how do I now know if I'm just given the address of the start of the string where the end is?

我只需要看到，哦，这里是一个D，让我接着往下看，这里是A，接着这是V，这是I，这是,然而，这是我们一周以前介绍的花絮，如果你给我一个字符串开始的地址,我怎么知道它什么时候结束？

哈佛公开课 - 计算机科学课程节选

It's only copying the address that was returned by get string so even though conceptually is the name this program suggests, I really just want to make a copy so that maybe I can make one version of D-A-V-I-D or F-O-O all uppercase or all lowercase or I want to spell check, something.

而只是复制GetSting返回的地址,虽然这个程序表示的名称，我只想做一个拷贝,以便我可以做一个D-A-V-I-D或者F-O-O的版本,大写的或者小写的,或者拼写检查之类的。

哈佛公开课 - 计算机科学课程节选

D-A-V-I-D It's not copying the F-O-O or the D-A-V-I-D.

它不是复制F-O-O，或者。

哈佛公开课 - 计算机科学课程节选