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Scientists say both studies demonstrate that certain parts of the ecosystem respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute.

科学家称这两项研究都表明，生态系统的某些部分对于大气污染的减少反应迅速，但这些发现不应该成为允许污染的理由。

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In his speech Wednesday night, President Obama said the idea is only one part of his plan and should not be used as an excuse.

VOA: special.2009.09.12

Most of these companies say their work should only be used as models and should not be turned in as a finished work.

VOA: special.2009.04.23

Traditional CPR should also be used for adults found already unconscious and not breathing normally.

VOA: special.2009.06.09

Like all medication it can have side effects, so it should not be used without medical supervision.

BBC: NEWS | Health | Bodybuilders' 'breast drug abuse'

She said they were not a necessity and should not be used for cosmetic purposes.

BBC: Health Committee

Chemicals should not be used in food products until they are proven to be safe.

CNN: Ban unsafe chemical from baby bottles and cups