Now Microsoft is sort of a funny place, we've got these big businesses but in the software business big businesses need to be constantly recreated.
现今的微软是非常有意思的地方,我们运行着庞大的生意,但是在软件交易上,大宗交易更像是消遣。
But it turns out that on Macs and if you have the right software on PCs, you can kind of get a teaser of what this environment tends to look like and be forewarned, what you're about to see is intentionally very underwhelming.
事实上,它是运行在苹果机上的,如果你在电脑上有正确的软件,可以去看看这个环境大致是怎么样的,提前说下,这个程序不会让你印象深刻,我是故意这样做的。
If you escape the pull of gravity, your spaceship will be off, won't be orbiting the Earth.
如果你完全脱离重力,太空船早就飞得没影了,而不是在轨道上运行
Let's run merge sort on it, and then we'll look at the code.
让我们在这个列表上运行归并排序,然后我们在看一下代码。
In our business, you got to be inventing new things because software doesn't wear out, it doesn't break, or at least if it breaks it was broken when you finished it, it doesn't break over time the way physical goods do.
在我们行业,你需要不断发明新事物,因为软件并不会磨损,不会坏,或者至少如果坏了,也是在你运行完之后,它并不像物理上的东西会随着时间磨损。
And orbiting around this is a lone electron out at some distance r.
有一个单电子,在环原子核的轨道上运行。
It was something like a central bank but it was different essentially in that the National Banks really didn't have authority to run monetary policy.
它像是个中央银行,但是在本质上不同,因为国家银行真的,没有什么权力运行货币政策。
Personality is a little bit like a program that's running on the computer.
人格有点像在电脑上运行的程式。
When the program is on your computer you say dot slash and this means on my computer.
当程序位于你的电脑上时,敲入,就意味着在我的电脑上运行。
Does it give you the answer that you expected it to give? Often, in practical problems, you'll spend just as much time doing performance debugging. Why is it slow?
它返回了期待中的结果了么?通常,在实际的问题中你会花,同样多的时间在性能调试上,它为什么运行这么慢?
So, an alternative to that that is incredibly common in just the programming world and in industry is to actually not write programs on your own personal computer but to actually write and run them on a server, someplace where the software is all standardized.
那么,在编程界和工业界普遍,使用的一个解决方案是,不在你自己的电脑上写程序,而是在服务器上编程运行,服务器上的软件都是标准化的。
But just realize as a teaser coming for problem set 1 will be instructions on how to activate your so called cloud account and it's on the CS50 cloud that you'll be writing your programs, compiling your programs, testing your programs, running your websites ultimately.
如果大家觉得难的话,习题集1上有一些说明,教你如何,激活你的云账户,因为你们只有在CS50云上才能编写程序,编译,检测,并最终运行。
Or get to run on the right processor.
或者运行在正确的处理器上。
I am going to say if that electron is to stay in its orbit, that is to say it doesn't flee the atom, it doesn't collapse under the nucleus then the sum of the forces on the electron must be zero No net force. And so that will be the sum of a dynamic force plus an electrostatic.
如果电子会保持在它的轨道上运行,既不脱离原子的话,它就不会由于原子核对它的吸引力而被瓦解掉,电子所受的合力一定为零,由于没有合力,所以电子所受力为动态力和静电力的总和。
So it turns out a really nice shortcut on most systems, oops, is to say if you have a file called hello.c and you wanna turn it into a program called hello, well, make hello just write in the command makeHello and it will do all of that for you automatically and hand you a program called hello.
就是寻找一种能在大多数系统上运行的更快捷的方式,哇!,也就是说,你有一个hello,c的文件,你想把它变成一个名为hello的程序,那么只需要敲入命令,它就会自动为你生成,一个hello程序。
But on the Mac, I'm gonna run this program called Terminal.
在Mac上运行一个Terminal程序。
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