But it's interesting to go a little further and think actually about what the concept means and where it comes from.
我们可以讨论得更深入些,想想这个概念的真正意义和它的来源
and keep on going back to home because this is where it comes from.
因为这些源自家庭,所以最终还是会不断回归家庭。
We'll talk about where it comes from, and the biological, economic, and political reasons that drive food to be certain things, and we'll talk about what it does to us and for us.
我们会谈到它的来源,生物学,经济学方面和政治方面的因素,是如何影响食品的,我们还会谈到它对我们的影响和帮助
Well, Locke tells us where it comes from and he gives two answers.
洛克告诉了我们它的来源,他给了我们两个答案。
But now, hopefully, we understand where that comes from, why it is that we use the shorthand notation.
但是现在希望我们明白,那是从哪来的,我们为什么要用简化形式。
And my purpose will be not to say something as a postulate, but to show you where everything comes from, and it's best for you if you try to follow the logic.
我的目的不是,简单地告诉你们一个假说,而是给你们讲清楚这个理论的来龙去脉,如果你们能理解推导过程那就再好不过
as far as it comes to, you know, where products come from, where products go and that sort of thing. But I mean,
我是说,像此类产品的发明,用途等等,我们从未想过。
Generally organic, it comes from organic farm where they practice sustainable,
一般来说,有机食物来自于有机农场,在那它们能实现可持续性,
They want to know where it comes from, who grew it in some cases, how many miles it got transported, what was put on the food as it was being produced, what was given to the animals or injected into them as the beef was coming out, or the pork, or the chicken and these will be very interesting topics to discuss.
人们希望知道食物从何而来,由谁种植的,从多远的地方运过来,在加工过程中,在食物中添加了什么,人们看到牛肉,猪肉或鸡肉时,会想知道这些动物,都被注射了什么,这些话题讨论起来都会很有意思
This is what's called the Bohr radius, and we'll explain - hopefully we'll get to it today where this Bohr radius name comes from, but for now what you need to know is just that it's a constant, just treat it like a constant, and it turns out to be equal to or about 1/2 an angstrom.
它叫做玻尔半径,我们后面会解释,希望我们今天可以讲到,波尔半径这个名称的由来,但现在你们只要记住,它是一个常数,只要把它当做一个常数对待,它等于,或者是1/2埃。
So these names, they don't really make any sense why they're called past s p and f, and it turns out that it comes from spectroscopy terms that are pre-quantum mechanics where, for example, this is called the sharp line, I think the principle, the diffuse, and the fundamental.
看到这些名字,你会发现,它们为什么叫s,p,f是没什么道理的,事实上,它们来源于,量子力学之前的光谱学中的术语,例如,它们分别叫做锐线,我认为是主线,漫射和基本。
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