Climate change is the long-term changes in the world's weather patterns that are mostly caused by human activity.

气候变化是世界气候模式的长期变化，主要是由人类活动造成的。

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During sleep, the brain reactivates patterns of neural activity that it performed during the day, thus strengthening the memories by long-term potentiation.

睡眠时，大脑激活白天活动的神经活动形态，因此通过长期势差过程巩固记忆。

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Where sar is different than iostat is that it has the ability to capture data for long-term analysis and trending through its system activity data collector (sadc) utility.

sar 不同于 iostat 的地方在于，它能够通过它的系统活动数据收集 (sadc) 实用工具，捕获数据以便进行长期的分析和趋势研究。

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Gerald Meehl says a better understanding of solar activity and its influence on weather may help researchers predict long-term weather conditions.

VOA: special.2009.09.29

If you go too far, however -- either with extreme short-term activity or long-term overtraining -- the immune system weakens.

CNN: Signs you're too sick to work out

Pfizer ( PFE - news - people ): Long-term options activity on the pharmaceutical giant indicates some strategists expect shares in Pfizer to remain range-bound through June 2011 expiration.

FORBES: Bulls Swing For The Fences With Priceline, Silver Wheaton

What studies alluded to have shown a connection between observed warming trends on Earth and long-term trends of cyclone activity?

FORBES: In Their Own Words: Climate Alarmists Debunk Their 'Science'