Under such a law, the federal government would set an overall limit on emissions each year, and then auction tradable permits to pollute up to that level.是什么意思_Under such a law, the federal government would set an overall limit on emissions each year, and then auction tradable permits to pollute up to that level.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句