他们特别适合系统在清洁大气的低功耗。
They are particularly suitable for low power systems in clean atmospheres.
在对流层大气中，适量臭氧对清洁大气是有益的。
In the natural air of the troposphere a suitable amount of ozone is beneficial to clean air.
今年四月份州长比尔•李特签署了《科罗拉多州清洁大气工作法案》，上述计划就是为了满足这个法案的要求提出的。
The plan was required under the Colorado Clean Air-Clean Jobs Act, signed by Gov. Bill Ritter in April.
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