If the question of time is not explicitly brought up, then you should know that you have to use this formula.
如果时间的问题并没有明确提出,那你应该知道,必须要用这个式子
- Well, just a moment ago, we did have -- -- and this time I'll use some chalk here -- a moment ago, we did have a picture depicting what was going on when you call the function.
好的,刚才,我们确实有-,这一次我将用一些粉笔-,刚才,我们有一张图描绘了当我们调用函数的时候,会发生什么事情。
And the reason is, and this will come up on the problems and a lot of students end up using this equation, which is why I want to head it off and mention it ahead of time, we can't use an equation because this equation is very specific for light.
原因是,很多同学在解题时,都会用这个方程,所以我要,事先提醒你们一下,我们不能用这个方程,因为它只对光是用。
This is important because we use this all the time for when, when we do technology.
因为当我们做技术工作,的时我们一直在用它。
This is a kind of argument that we use all the time.
这是我们常用的一种论证方式
This is the slide that I left on last time and the idea here was to use plasmids, which I talked about last Thursday, to introduce genes into animals.
这是我上节课没讲完的一张幻灯片,这里的思路是利用,上周四所讲过的质粒,以将基因导入动物体内
Now we're going to I'm going a bit slow here but I'm going to use this method next time to introduce you to the most important class, sorry, the most important game we're going to see in the whole course.
接下来我们,我放慢一点,在下一讲我还要用这个方法,我要向大家介绍最重要的课程,抱歉,是整个课程中最重要的博弈
And it's a topic I want to pick up on today, we're going to do for the next few lectures, and it's a topic I want to spend some time on because this idea of capturing data and methods, the term we're going to use for it, but data and functions that belong to that data, things that can be used to manipulate them, is a really powerful one.
我们会在今天讲这个话题,在后面几节课还会讲这个,这是个我愿意花点时间,在上面的话题因为这是个,捕获数据和方法的思想,我们用这个术语来形容它,数据中包括了数据和函数等,能用来操作它们的东西,真的是很强大的工具,我们真正要讲的东西是,我们要学会如何把信息。
the word "Jew" isn't something we can really historically use until about this time , so most of our period we're going to be talking about the ancient Israelites to become an Israelite, you simply joined the Israelite community, you lived an Israelite life, you died an Israelite death.
关于Jew这词历史上,直到公元前500年才开始用,所以我们的大多数时间,将会讨论古以色列人,成为一个以色列人,你只要加入以色列人社区,按以色列人方式生活,按其方式安葬。
But we'll use this over time but the percent sign essentially gives you the remainder.
在以后我们会用到,%给你的是余数。
Convention, OK, this negative sign is just a pure convention. You just got to use it all the time. If you use an old textbook, written when I was taking thermodynamics, they have the opposite convention, and it's very confusing. But now we've all agreed on this convention, and work is going to be with the negative sign here.
系统对外界做功的符号为负,这就是我们,在本课中的规定,纯粹出于统一符号的需要,有些教科书中,可能会使用相反的符号规定,注意不要混淆了,这门课上,我们将一直使用。
We have to build this whole new detector, is this really the best use of my time?
最后测到了132000个alpha粒子,我们还要找什么?
c We know it's very specific for light because in this equation is c, the speed of light. So any time you go to use this equation, if you're trying to use it for an electron, just ask yourself first, does an electron travel at the speed of light?
我们知道它只对光适用是因为在这个方程里有,光速,所以下次你们用这个方程前,如果你们要把它用到一个电子上,先问问你自己,电子的运动速度是光速吗?
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