He has been substantially involved in the US EPA programs in Superfund and the Resource Conservation and Recovery Act for approximately 20 years.
近20年，他一直投身于超级基金及资源保存与回收法案的美国环保署(US EPA)计划工作。
He has been substantially involved in the US EPA programs in Superfund and the Resource Conservation and Recovery Act for approximately 20 years.
近20年，他一直投身于超级基金及资源保存与回收法案的美国环保署(US EPA)计划工作。
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