自然环境保护主义者大多致力于保持物种的多样性。
Conservationists are mostly wedded to preserving diversity in nature.
数万年来，自然环境渐渐的将人类塑造成现在这样的物种。
Millions of years ago, the natural environment was shaping us into the species we are now.
尤其是，有些物种已经成功适应了大火的温度和浓烟，以及在火灾发生之后的那种烧焦的环境中繁衍生息，但对火灾的全面控制已使这些无法在自然环境中生存。
In particular, it has deprived the environment of its share of species that have adapted successfully to heat and smoke, and proliferate in the charred environment that follows a wildfire.
正是通过改变动物生存的自然环境，人类才毁灭了一些动物的物种。
It was by changing the animals living environment that man destroyed some animal species.
达尔文的理论认为，物种在自然环境中优胜劣汰，进化由此产生。
According to Darwin's theory, evolution occurs because the environment naturally weeds out the weaker species.
达尔文的理论认为，物种在自然环境中优胜劣汰，进化由此产生。
According to Darwin's theory, evolution occurs because the environment naturally weeds out the weaker species.
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