第二种生态系统是自然生态系统部分地受到人类活动的干预而形成的, 我们称之 为被改变了的环境(The transfomcd environment) , 从整体上讲, 人们在驯化动植物的同时, 也大大 地改变了生态系统, 改变了地表面原来的自然状态下的那种生物组合关系, 农业...
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可以举出很多很多的例子说明自然生态环境已经被迅速地改变了,亚马逊河流域就是最好的例证。
A number of examples can be given of the way in which natural environments are being rapidly changed - Amazonia, for instance.
另一个缺点则是,这种计划的副作用在很大程度上是未知的,而且有可能是可怕的。 比如说,在这种被改变了的生态环境中,可能会有杂草类的无种能从中得益以对海洋造成更大的危害。
Another drawback is that the side-effects are largely unknown and potentially horrible if, for example, a “weed” species were to take advantage of a changed ecosystem.
我们现在知道的是,大脑更容易被环境中的固有陈规和态度影响,它们并没有改变行为,而是改变了大脑。
What we now know is that the brain is much more affected by stereotypes in the environment and attitudes in the environment, and that doesn't just change behaviour, it changes the brain.
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