There shall not be any use of forced labor, whether in the form of prison labor, indentured labor, bonded labor or otherwise.

即使是监狱劳工﹑契约劳动﹑抵押做工或其他形式的劳力，它也不应该有强迫劳动的性质存在。

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No prison labor may be used. Is is illegal to import products produced by prison labor in the the United States per U. S. Customs and Border Protection.

不得使用监狱劳动力。根据美国海关与边防局，进口监狱劳动力生产的产品进入美国是违法的。

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While in prison, he performed hard labor at a lime quarry.

在服刑期间，他在石灰采石场里做着苦工。

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Robert Kennedy, was sentenced to 30 days in prison for trespassing, as was labor leader Dennis Rivera.

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One of the most powerful union leaders at a time that unions wielded a great deal of sway over elections -- and were notoriously tied to organized crime -- Hoffa was forced out of the organized labor movement when he was sent to prison in 1967.

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