Consider humans as part of these ecosystems, you've probably heard about water shortages or restrictions on how much water you can use, especially in the summer time, in recent years.

考虑到人类是这些生态系统的一部分，你可能听说过，水资源短缺可能会限制你可以使用多少水，特别是近些年夏天的时候，

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But others would invoke a higher being as a designer to explain the complex world of living things, especially such specimens as humans.

但也有一些人会祈求更高的生灵作为设计师来解释有生命的复杂世界，特别用来解释像人类的那种物种。

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They say the reason for this is that humans –and especially children –devote a great deal of energy running their brains.

科学家称得出这个结论的原因是，人类，特别是儿童总是把大量能量投入到大脑运转上。

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H5N1 typically spreads between birds, but can jump to humans, especially if they're living in close proximity.

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Abrams are perhaps the most polarizing humans ever, especially when they kill off favorite characters or use too many lens flares.

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It is therefore essential to understand how this disease is transmitted from one species to another, especially in the case of humans where the infectious prions survive through stages of cooking and digestion.

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