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| 1. | So the rare field reversals are most likely caused by larger changes in the flow in the outer core, or |
| 这样，不经常发生的磁场倒转，很可能是由外核流体或磁场曲线通过扩散宛然进人流体方式发生较大的变化而引起的。 |
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| 2. | Evidence indicates that the outer core is about twice as dense as the material in the mantle. |
| 有证据表明，外地核的密度约为地幔物质的两倍。 |
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| 3. | examples of the continuum of fluctuations in the dynamo processes, an El Niflo in the weather of the outer |
| 当然，其原因可能是如此大的波动只不过是发电机过程中波动连续体的极端例子，一个外核气候中的厄尔尼诺现象。 |
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| 4. | A large volume of electrically conducting fluid, the iron-rich liquid outer core of the earth, is the |
| 第一要件，要有大量的导电流体─地球的外核为液态，且富含铁质。 |
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| 5. | earth's outer-core |
| 地球外核 |
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| 6. | about2, 900kilometers(1, 800miles)and probably consisting of iron and nickel.It is made up of a liquid outer |
| 地核地球的中心部分，地幔以下，开始于深为2，900公里（1，800英里）的地方，大概含有铁和镍。它由一个液体的外核和一个固体的内核组成 |
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| 7. | ensures that this heat is lost relatively slowly, which explains why our planet still has a molten outer |
| 地球因为体积巨大（径约1万2740公里）使热能损耗得相当慢，这说明了为什麽地球至今仍有著熔融的外核，而且地表还有火山喷发。 |
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| 8. | diffuse throughout the pool, a Concentration of magnetic field lines diffuses throughout the planet's outer |
| 与游泳池中一滴有色的染料在池中迅速扩散的方式一样，一个浓缩的地磁场曲线的扩散遍布地球的外核。 |
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| 9. | magnetic field lines are trapped in good electrical conductors such as the molten iron of the Earth's outer |
| 发生磁场的再生是因为磁场曲线被限制在良好的电导体内，如地球外核的熔融铁。 |
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| 10. | reversals because the field cannot change (diffuse) within the inner core as quickly as in the fluid, outer |
| 尽管流体运动会在几千年的时间尺度上使磁场倒转，但因为磁场的变化（扩散）在内核里不能与在外核的流体中一样快，所以固体的内核会尽力阻止倒转。 |
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