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雅思阅读真题详解：Sun's fickle heart may leave us
cold
对于雅思阅读复习而言，雅思阅读真题详解无疑是非常关键的一个资料，为此智课小编特收集整理了Sun's fickle heart may leave us cold的雅思阅读真题详解，分享给大家，希望对大家有所帮助，文中观点仅供参考。 1 There's a dimmer switch inside the sun that causes its brightness to rise
cold怎么读
and fall on timescales of around 100,000 years - exactly the same period as
between ice ages on Earth. So says a physicist who has created a computer model
of our star's core. 一物理学家宣称，太阳核心位置处存在着一个变光开关，可以调节亮度变化，周期为十万年，正好与地球冰川时期所经历时间相同。他还创造了太阳核心的一个计算机模型。 2 Robert Ehrlich of George Mason University in Fairfax, Virginia, modelled the effect of temperature fluctuations in the sun's interior. According to the
standard view, the temperature of the sun's core is held constant by the
opposing pressures of gravity and nuclear fusion. However, Ehrlich believed that
slight variations should be possible.
来自于弗吉尼亚洲费尔法克斯的乔治梅森大学的Robert
Ehrlich用模型模拟了太阳内部温度变化所带来的影响。根据标准说法，太阳内部的温度在重力以及核熔解的反作用下应该是持续不变的。但是，Ehrlich却认为轻微的温度变化还是有可能的。 3 He took as his starting point the work of Attila Grandpierre of the
Konkoly Observatory of the Hungarian Academy of Sciences. In 2005, Grandpierre
and a collaborator, Gábor ágoston, calculated that magnetic fields in the sun's
core could produce small instabilities in the solar plasma. These instabilities
would induce localised oscillations in temperature.
Ehrlich首先用Attila Grandpierre的发现引出自己的观点。Attila Grandpierre来自匈牙利科学研究院Konkoly天文台。2005年时，Grandpierre和同事Gábor
ágoston通过计算得出，太阳内核中的磁场会引起太阳等离子体的不稳定运动。这些无规律的运动就会导致局部温度变化。 4 Ehrlich's model shows that whilst most of these oscillations cancel each other out, some reinforce one another and become
long-lived temperature
variations. The favoured frequencies allow the sun's core temperature to
oscillate around its average temperature of 13.6 million kelvin in cycles
lasting either 100,000 or 41,000 years. Ehrlich says that random interactions
within the sun's magnetic field could flip the fluctuations from one cycle
length to the other. Ehrlich的模型表明，尽管大多数等离子振动会相互中和，但也有一些是相互加强的，这就形成了一个长时间的温度变化。这种频率变化会使太阳内核的温度围绕它的平均温度1360万开变化，变化周期为10万或4.1万年。Ehrlich还说，太阳内部磁场中这种随意的互动会轻易的使这种周期在两者之间变换。 5 These two timescales are instantly recognisable to anyone familiar with Earth's ice ages: for the past million years, ice ages have occurred roughly
every 100,000 years. Before that, they occurred roughly every 41,000 years. 任何一个熟悉地球冰川时期的人都会立刻明白这两种周期。在过去的一百万年里，大约每十万年就会出现一次冰川时代，在此之前，大约每4万一千年就会出现一次。 6 Most scientists believe that the ice ages are the result of subtle

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