During REM sleep, our brain waves-the oscillating electromagnetic signals that result from large-scale brain activity-look similar to those produced while we are awake.

在REM睡眠期里，我们的脑电波(由大规模的脑力活导致的振荡的电磁信号)貌似与我们清醒时所产生的脑电波雷同。

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In short, the Sun's large-scale magnetic field is taken to be self-sustaining, so that the solar-activity cycle it drives would be maintained with little overall change for perhaps billions of years.

简单来说，就是太阳的巨大磁场被用来进行自我维持，所以，由其驱动的太阳活动周期将会在几十亿年的时间里维持整体上维持极小的变动。

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Evacuation is quite difficult for a large-scale supermarket when fires happen because of the personnel activity concentration, bigger fire density and further dispersing distance.

某大型超市具有人员活动集中、火灾荷载密度较大以及疏散距离超长等特点，需要重视消防设计和安全分析。

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The Royal Navy works with what the military call Mission Command, which sets out the intent, strategy, resources, contingency and inspiration for any large-scale activity (it actually derives from Nelson's order of battle set out a month before Trafalgar).

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The U.S. intelligence community and special operations forces will continue to wage a vigorous campaign against the remnants of Al Qaeda, but the period of large-scale U.S. military activity in Southwest Asia is coming to a close.

FORBES: The Real Reason We're Leaving Afghanistan

Here we examine the strikingly large global interannual variability of TC ACE during the past 40-years and shed light on the large-scale climate mechanisms responsible for the recent historical downturn in TC activity.

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