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Yves Frenot is deputy director of the French Polar Institute.
VOA: special.2009.06.03
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So for example I defined p, remember back over here, as a Cartesian point, but I can actually ask for its polar form.
我可以要求返回它的极坐标形式，这里对我是可访问的，好，这很棒，请再记另外一个为什么。
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So it's kind of the polar opposites,
虽然这两种是截然相反的衣服，
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Warmer temperatures cause water to expand,a phenomenon called thermal expansion, and cause glaciers and polar ice caps to melt.
VOA: standard.2009.11.09
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So, we know from our calculation that we can do over here, that this bond is polar.
我们通过计算都知道,这个键是非极性的。
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He says this piece of work is more about the melting ice of the Arctic than polar bears.
VOA: standard.2009.12.13
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Another reason I wanted to point this out in terms of the polar coordinates that we're using, is I think they're actually flipped from what you're used to seeing in physics.
另一个我想指出,我们采用极坐标的原因是，我认为它们实际上是,从你们习惯于看到的物理学中出来的。
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While this work isn't about polar bears specifically, the melting Arctic does mean they're threatened.
VOA: standard.2009.12.13
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the same as polar point 2, polar point 1 And then I could say well, gee, are they the same point?
和另外一个极坐标点，我如果来试试，和polar，point，2是不是相同的话？
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He was inspired when visiting a remote Inuit community in Northern Canada, and now wants to share his experiences of seeing polar bears and the Arctic.
VOA: standard.2009.12.13
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In terms of the Schrodinger equation, we now can write it in terms of our polar coordinates here.
在薛定谔方程中，我们现在可以用,极坐标的方式来表示了。
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These glaciers are the largest body of ice outside the polar caps.
VOA: standard.2010.01.23
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The second way to have something that is net nonpolar is to have spatially symmetric disposition of polar bonds.
第二种构成,需要空间非极性,就是需要极性键的空间对称分布。
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inside,a bronze skeleton modeled on a full-size male polar bear.
VOA: standard.2009.12.13
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This is pure covalency. This is polar covalency.
这是平均共价，它是极性共价。
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Walsh spent eight years in academia. The retired Navy captain continued to pursue his passions as a scuba diver, private pilot and explorer, participating in dozens ocean dives and expeditions to the polar regions.
VOA: standard.2010.06.21
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A good example of that is CH4, because the CH bond is polar but symmetrically disposed in space.
甲烷就是一个很好的例子，因为极性键是,空间对称的。
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I could imagine writing another function for same point, and I have to give it a name like same point polar, and same point Cartesian.
程序不知道怎么来做了,它没有对应的处理方法，所以它要抱怨了,那么我这里的问题就是，这也是我一直想要说的。
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If it's in polar form I passed in a radius and angle and I'll compute what the x- and y- value is.
以及半径和角度,但是现在是这样的,不管我是以哪种形式。
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Because this is a dipole, he chose the pole part of dipole to give us polar covalency.
这就是偶极，鲍林选择了偶极中“极“这一部分来,组成极性共价这个词向我们诠释。
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Here is the question. Is methane a polar molecule or a nonpolar molecule? Let's look carefully.
问题是，甲烷是一个极性分子还是非极性分子,我们仔细看看。
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And then I could do things like again, say, okay having done, that let me just run it here, run that, so I've now got polar point 1, and polar point 2.
然后给它们赋值半径和角度，然后我可以进行刚才的操作，也就是说，对刚才的笛卡尔坐标进行的操作，让我们来运行下它吧，运行下，现在我有一个极坐标点。
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I've got a definition of Cartesian point, I've got a definition of polar point.
让我们运行这个程序，来把应用这些定义。
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We only have the one bond so the actual HF molecule is polar, it has a net dipole.
但HF中只有一根键,所以分子也是极性的而甲烷中有一个网状偶极。
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So you can see that polar covalency is a tendency towards ionic bonding.
所以你看得出极性共价就是,趋向离子键的。
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We know that it's non-polar.
我们都知道他是非极性分子。
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How do you know whether it's in Cartesian form or in polar form?
这没什么了不起的,但是现在出现问题了？
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If I now say, I'm going to go ahead and change the radius of this, something, my polar form did it right, but what happened to the Cartesian form?
如果我现在说，我要去改变这里的半径,一些这样的操作，我的极坐标形式，进行了正确的改动？
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Other polar solids, we will have to come back to that later.
其它的极性固体，我们在后面会讲到这一点。
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I could do the same thing, I could build polar point.
很多笛卡尔点，我可以做一些同样的操作。
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