We are close to a knowledge of annual summer and winter temperature variations over much of the northern hemisphere going back 600 years.

我们很快就会知道，600年前北半球大部分地区每年夏季和冬季的温度是如何变化的。

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In contrast, high-frequency fluctuations such as seasonal temperature variations are observable and somewhat predictable, so that groups could have adapted their behaviors accordingly.

相反，诸如季节性温度变化等高频波动是可以观察到的，而且在某种程度上是可以预测的，因此群体可以相应地调整它们的行为。

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More recent temperature variations have been relatively much more stable and moderate.

较近期的温度变化一直相对稳定而温和的多。

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The other telescope,known as Planck, will study temperature variations from the very early universe.

VOA: standard.2009.05.14

Baseball players deal with temperature variations between April and October, but any really bad weather day means a postponement.

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More recent temperature variations have been relatively much more stable and moderate.

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Scientists say there are temperature variations in this ancient heat energy that can give them insights into the early structure of the Universe.

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