The size of the North Polar Ice Cap in the month of September is only half the size it was a mere 50 years ago.

In contrast, variations of ion temperature are very different in the two regions, with little change in polar cap while strong enhancement in auroral oval, implying a difference in key mechanisms for the negative storms in the two regions.

但离子温度的变化在两个区域很不相同，在极光椭圆区大幅度升高，而在极盖区没有显著变化，反映出引起F区负暴的主要机制在两个区域不尽相同。

Except the dynamo effect induced by the neutral wind, the driving electric field across the polar cap and the region 2 field-aligned current, caused by the magnetospheric coupling, are also taken into account.

除中性风场感生的发电机效应外，还包含了磁层耦合（极盖区边界的晨昏电场和二区场向电流）的驱动外源。

Visible also in the above images are the north polar cap of Mars, dark and light soil, clouds, and, in the early images, a global dust storm.

上面的影像中也可以看到火星的北极冰帽，亮暗不同的土壤，云层，以及早期影像中的沙暴。

But there are some differences between them: under current driving situation, the potential at the boundary of the polar cap is not constant but decreases exponentially toward the steady state;

但两者也有一定的差异。这主要表现在，电流驱动下极盖区边界上的电位不再是常量，而是一个随时间作指数衰减的函数，最后趋于稳态值；

This year, Shanshan's dad was a pilot on flights over the Polar Cap.

今年，姗姗的爸爸成为了飞两极冰帽的航班上的飞行员。

Zuber and her colleagues also analyzed Mars's much larger northern polar cap.

尤伯和她的同事也分析了火星上要大得多的北部极地冰冠。

And some may exist in the southern polar cap& but not much.

还有些存在于南部极地冰冠中一但不会太多。

Based on the polar cap model of pulsar γ-ray emission, considering the cascade process of photon in the magnetosphere, we propose the concept of transposition efficiency of energy in the cascade process and obtain the formula of it in this paper.

本文作者在脉冲星γ射线辐射的极冠模型的基础上，考虑光子在磁层中的级联过程，提出了级联过程中能量转化效率的概念并得出了转化效率公式。

But the main reason is I am actually fond of my phone. I do poke fun at it when my friends catch me using it, but this is a defensive gesture, to prevent others from laughing at it and at me.

最主要的是我很喜欢我的手机，当我朋友用我的手机的时候，我就那我的手机看玩笑，这只是一个小小自卫计策，防止他们嘲笑我。

We do not intend to be insensitive or to poke fun at last Friday's incident, the paper said in a front-page apology Monday, adding that it was very sympathetic to the plight of the Japanese people.

周一，该报在头版发布的道歉声明中表示：我们并不是想对上周五的灾难表示漠不关心或者冷嘲热讽。另外他们还表示该报非常同情日本民众目前所处的困境。

The images were being used to poke fun at the jury's ruling that the South Korean firm had copied the shape of Apple's wildly popular iPhone, which ( like most) is rectangular with curved corners.

这些剧照被用来取笑陪审团的裁决：三星抄袭了苹果公司广受欢迎的常见的长方带圆角形状的iPhone。

Portuguese Olympic cross-country skier Danny Silva said these events bring out the best in the usually sombre Finns, letting them goof off, dress up, and poke fun at themselves.

葡萄牙奥运越野滑雪选手丹尼•席尔瓦说，这些新奇的比赛激发出了芬兰人的热情，这些长期笼罩在阴郁（冬日）里的人们打扮一新，自娱自乐，轻松愉快。

At one of the Washington correspondent's dinners, that ability to poke fun at himself seemed to be the primary thing the media responded to favorably.

在一次华盛顿记者晚宴上，拿自己开涮的能力似乎成了媒体正面报道的主要素材。

Shirts designed by Dan McCall poke fun at the NSA as "the only part of the government that actually listens."

丹·麦考尔所设计的衬衫取笑国家安全局为“政府唯一一个只会监听的机构。”

You may even poke fun at yourself or let other people make jokes about you because you are able to mentally draw the line between humor and degradation.

甚至你会自嘲或让别人取笑你，因为你能够很清晰地分辨幽默与讽刺的区别。

Again and again these feminist lexicographyers refuse and indeed poke fun at the mainstream lexicography.

这些推崇女权主义的词典编纂者们一次次地拒绝，甚至取笑主流词典编纂学的做法。

It has been a long-standing practice to poke fun at our cultural icons, symbols, public figures and celebrities.

拿文化偶像、标志、公众人物和名人来开涮，历来有之。

Chua tried to paint a self-effacing portrait and use humour to poke fun at her shortcomings.

蔡美儿试图描绘一副低调的画像，并利用幽默取笑自己的短处。

The ability to distance from the everyday challenges of being in a relationship, and even poke fun at them, can bring long-term stability.

距离的能力将自己从日常生活中解脱出来，甚至取笑别人，从而保持长期稳定。

It goes on to poke fun at British cuisine, drinking-habits and sport.

小报还那英国的美食、酒文化以及体育开涮。