Our studies show that the Cartesian coordinate offers more perfect description than the spherical polar one does.

本文还表明，笛卡儿坐标比球坐标能提供更多的物理内容。

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Whether it's in the hands of animated polar bears or Santa Claus, there's one thing you'll find in nearly all ads for Coca-Cola: the characteristic glass bottle.

无论是在动画片中北极熊的手里，还是在圣诞老人的手里，几乎所有可口可乐的广告里都有一样东西：标志性的玻璃瓶。

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If the ice keeps becoming water, one day there might not be any polar bears.

如果冰继续融化，有一天北极熊可能就不复存在了。

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And I think in the polar one I said, if, what did I do there, I said, yeah, again if the x and y are greater than the other one, I'm going to return them to it.

然后我要返回一些值，我认为在极坐标的形式下我说过，如果，我在这里做了什么来着,我说过，对，再说一次，如果x和y坐标。

麻省理工公开课 - 计算机科学及编程导论课程节选

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。

麻省理工公开课 - 固态化学导论课程节选

Once I've got that, you notice I can now define a polar point, same way. Notice I've now solved one of my problems, which is, in each one of these cases here, I'm creating both x y and radius angle values inside of there.

你们注意到我现在可以，定义一个极坐标点了，以同样的方式,请注意到现在，我已经解决了我的问题之一了，也就是，在这些例子中的每一个,我在里面都创建了x，y值。

麻省理工公开课 - 计算机科学及编程导论课程节选

The Polar Plateau is one of the most inhospitable places on Earth.

BBC: Internet to reach South Pole

"Polar bears are one of the biggest conservation success stories in the world, " says Drikus Gissing, wildlife director for the Canadian territory of Nunavut.

WSJ: Are Polar Bears Really Disappearing?

But after months of reporting and hundreds of bear sightings, I kept running up against an inconvenient truth: There were a lot of well-meaning, well-credentialed scientists, wildlife officers and local experts who simply didn't believe that polar bears were one ice cube away from extinction.

WSJ: Are Polar Bears Really Disappearing?