"Hovering directly above Mars limits communications to just one polar region."

直接悬停在火星，就把通讯限制在仅一个极区。

youdao

'Hovering directly above Mars limits communications to just one polar region.

直接悬停在火星，就把通讯限制在仅一个极区。

youdao

They aren't afraid of humans, " Ludmilla says, gleefully recalling how one polar bear ripped the scalp from a Russian scientist living on Franz Josef Land.

它们不怕人类。” 她说，并生动地讲述一只北极熊如何将一个住在Franz Josef Land的俄罗斯科学家的头皮揭下。

youdao

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

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

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 task is complicated by the fact that there isn't one monolithic polar bear population.

WSJ: Are Polar Bears Really Disappearing?

What the Chinese were thinking when they deliberately destroyed one of their polar orbiting satellites in 2007 with a missile is anyone's guess.

BBC: Space debris: Time to clean up the sky

He said it could take up to 35 days and was "one of the great polar challenges".

BBC: Philip Goodeve-Docker dies during Greenland ice trek