求翻译：2015 年初巴西檢調單位調查國營石油公司 Petrobras 的弊案，汙點證人指證巴西總統羅賽芙與多名政府要員都曾收受賄賂，金額高達 20 億美金。是什么意思？

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In early 2015 Brazil audit-unit survey federal oil company petrobras harm case, dirt point by means of Brazilian president of basil, 芙 with more than one government to agent will have your 受賄賂, amount up to 20 billion USD.

At the beginning of 2015 Brazil And adjustment Unit investigated state oil company Petrobras the shortcoming document, stain witness refers to card Brazil President the Rosay lotus all once to receive the bribe with the famous government important people, the amount reaches as high as 20 hundred mil

Early 2015 Brazil prosecutors unit investigation of State-run oil company Petrobras scandal, tainted witnesses to testify against Brazil President rousseff with a number of government officials had taken a bribe in the amount of up to $ 2 billion.

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