And this is because as you start writing--saving files to your hard drive, what happens is you might save this file here, then this one, then this one, then this one, but very reasonably you might go back eventually and delete this one.

这是因为当你开始对硬盘驱动器进行读写时,你可以保存一个文件到磁盘的某处，然后再一个，再一个，又一个，最后你可能回到这,并删除这一个文件。

哈佛公开课 - 计算机科学课程节选

And if you have your calculator all set up as you love and you don't want to change it, then maybe you should just go and get an $8.00 scientific calculator that doesn't have any of the graphing functions, because you don't actually need them, so that's a better option for you, you can do that as well.

如果你的计算器里已经按照你的喜好编好了,而你又不想改动，那么或许你可以,去再买一个八美元的科学计算器,它没有任何绘图功能，因为实际上你也用不到这些，所以这对你来说是一个更好的选择，你也可以这样做。

麻省理工公开课 - 化学原理课程节选

And again, I think these days they tend to down date it by another century or so, so it might be around 1900 B.C.

其实在今天,我认为他们又能把时间再推进,一个世纪左右,即精确到公元前一千九百年左右

耶鲁公开课 - 古希腊历史简介课程节选

And notice, unlike Scratch where some of you might have realized it starts to get a little ugly, you have an "if else" and then you have another here and another one and things start to move and move and move like this, it gets very messy.

请注意，不像Scratch，在那里,你们其中某些人可能认识到它变得有点丑，你有一个“if，else“然后这里又另一个,那里又有一个，代码就像这样开始跳转，跳转再跳转,它开始变得有点凌乱了。

哈佛公开课 - 计算机科学课程节选

And when you talk about n for an orbital, it's talking about the shell that shell is kind of what you picture when you think of a classical picture of an atom where you have 1 energy level, the next one is further out, the next one's further away.

当你们谈到，某个轨道的n时，你们说的是壳层，壳层就是,你想象，一个原子,的经典图像时的场景,你有一个能级，下一个再更远的地方，再下一个又更远。

麻省理工公开课 - 化学原理课程节选