有证据表明，这一时期发生了重大的生态和地质变化。
There is evidence of major ecological and geological changes during this period.
如果把生态系统保护好、经营好，像狭足袋鼩这样的物种在残酷的萧条时期就有更多的生存机会。
Species like the lesser hairy footed dunnart have a better chance of survival during the unforgiving bust periods if their ecosystem is protected and well managed. (Dr Adam Kerezsy)
在北澳大利亚兰杰（Ranger）铀矿26年开发史的大部分时期内，它一直受到来自生态学家的抗议，他们反对在一个世界遗产公园的周边地区开发铀矿用于核燃料生产。
FOR much of its 26-year life the Ranger uranium mine in north Australia has seen protests from ecologists who oppose digging for nuclear fuel on the edge of a world heritage park.
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