美国环境保护局（EPA）规定，在美国销售的汽油必须含有洗涤剂，保证污染物在排出尾气管之前就被分解掉。
The US Environmental Protection Agency (EPA) requires that automotive fuels sold in the United States contain detergents to help scrub away pollution before it goes out the vehicle’s tailpipe.
美国环境保护局（EPA）规定，在美国销售的汽油必须含有洗涤剂，保证污染物在排出尾气管之前就被分解掉。
The US Environmental Protection Agency (EPA) requires that automotive fuels sold in the United States contain detergents to help scrub away pollution before it goes out the vehicle's tailpipe.
尽管你很少会在杂货店肉案看到辐照过的牛排，但按照美国环境保护局的说法，电子束辐照确实是一个行之有效的做法。
Though it's fairly uncommon to see irradiated steaks in your grocer's meat case, electron beam irradiation is a well-established practice, according to the U.S. Environmental Protection Agency.
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