世界人口的日益增长是造成热带雨林破坏的一个主要原因。
The world's growing population has been a primary cause of rain forest destruction.
世界人口的日益增长是造成热带雨林破坏的一个首要原因。
The world's growing population has been a primary cause of rain forest destruction.
当我们面对这些恐怖的预警时，比如全球变暖，热带雨林破坏，或者有毒垃圾，基于过往的历史，我们应该有几分信任？
With what confidence should we look upon the projected horrors of global warming, rain forest destruction, or toxic waste, given the record of the past?
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