In their study, the researchers tested blood for cotinine,a chemical which is produced when nicotine is metabolized, so they got an objective measure of how much smoke the teenagers were exposed to.
VOA: standard.2010.03.04
As we said, Newtonian mechanics does work in most cases, it does work when we're discussing things that we can see, it does work even on things that are too small to measure.
在大部分情况下都适用,对我们可以看到的东西,它都能适用,甚至对一些小到,无法测量的东西它也可以适用。
So when we talk about formal charge, basically formal charge is the measure of the extent to which an individual atom within your molecule has either gained or lost an electron.
说到形式电荷,基本上形式电荷就是,单个原子在形成分子之后,是得到了电子还是失去了电子的一种量度。
Republican Jeb Hensarling says changes agreed to by Democrats and Republicans have improved the measure,adding that it should attract strong bipartisan support when it comes up for a vote in the House.
VOA: standard.2009.04.28
When we do experiments, each group of three has an experimental setup to measure the phenomenon.
当我们做实验的时候,每个三人小组建立实验设备,来测量观察的现象。
We'll come back to this in our example in the cardiovascular system when we're talking about the heart and we'll talk about how to measure the collective group of action potentials using EKG's.
这个我们回头再谈,等到我们在心血管系统的例子中,说到心脏时再说,我们会谈到如何通过,心电图测量群体动作电位
And that's just a way of reminding you that we want to think carefully, but what are the things we're trying to measure when we talk about complexity here? It's both the size of the thing and how often are we going to use it? And there are some trade offs, but I still haven't said how I'm going to get an n log n sorting algorithm, and that's what I want to do today.
这只是在提醒你们我们要仔细的思考问题,但是当我们在讨论复杂性的时候,我们到底要衡量哪些东西?,是列表的大小和对其进行查找的频率吗?,这里面临一些取舍,但是我还没有说明,怎样得到一个n,log,n复杂度的排序算法,并且这是我今天想要讲的内容。
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