Poor soil keeps many farmers in Africa from growing good crops.

He work hard to produce good crops from poor soil.

他辛勤耕作，为使瘠薄的土地上长出好庄稼。

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Discussion on Foundation Treatment Technologies under Conditions of Poor Soil Layers

劣质土层地基处理技术浅议

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It can survive in poor soil and without much water.

它能够在贫瘠的土壤里生长，不需要多少水。

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Plant would damaged more with high humidity in soil and air, poor soil and application of N fertilizer.

土壤和空气中的湿度高或贫瘠土壤等环境因素及增施N素肥料等，都会加重植物受害。

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Crops could be made to grow on poor soil in marginal lands, increasing overall food production.

可以使作物在边际土地的贫瘠土壤中生长，增加粮食总产量。

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I hadn't nearly come to the end of an earlier wonderful worry of mine about the polar ice cap melting and raising the level of the Atlantic Ocean enough to submerge the entire East Coast.

我还没有来的急从早先的当心两极冰帽融化，大西洋水位要长高并逐步淹没整个东海岸中抽身出来。

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The maker of the endless pool has put the bears to music on his web site. a Jacuzzi may make things bearable but heaven is a polar ice cap.

涡轮游泳池的制造者把配有音乐的北极熊放到他的网站上。一个如意按摩浴缸也许能让北极熊受用，但是真正的天堂还是一块北极冰盖。

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Melting of the polar ice cap is a global concern because it has the potential to alter the geopolitical balance in the Arctic heretofore frozen in time.

北极冰帽融化正引起全世界的关注，它有可能改变该地区的地缘政治平衡，这种平衡长期以来因冰冻而固定。

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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.

北极冰盖在9月份的大小，只相当于50年前的一半。

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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。

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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。

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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。

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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；

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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。

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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。

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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。

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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。

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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。

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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。

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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。

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