ur
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aturalprocessesi
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tsTodayboth
aturalscie
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dphilosophersareaski
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evitable
久而久之，这些合成物质转变成废弃物，那些原本毒性不大的物质在自然循环中变为极其有害的物质。自然科学家和哲学家如今都在问自己这样一个问题：人类对生物圈的破坏难道是无法避免的吗？close
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