The other two gases have significantly less impact: isoflurane is only a third as powerful a greenhouse gas as is desflurane and sevoflurance has only an eighth of desflurane's effect.
其他两种气体可以显著减小对环境的影响：异氟烷体现在温室气体的作用上仅仅是地氟醚的三分之一，而七氟醚只有地氟醚的八分之一。
The other two gases have significantly less impact: isoflurane is only a third as powerful a greenhouse gas as is desflurane and sevoflurane has only an eighth of desflurane's effect.
另外两种气体产生的影响就小得多。异氟烷所产生的温室效应仅有地氟烷的三分之一，七氟烷仅有八分之一。
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