In the case of a work of joint authorship, the term shall expire on December 31 of the fiftieth year the death of the last surviving author.
如果是合作作品，截止于最后死亡的作者死亡后第五十年的12月31日。
In the case of a work of joint authorship, the term shall expire on December 31 of the fiftieth year the death of the last surviving author.
如果是合作作品，截止于最后死亡的作者死亡后第五十年的12月31日。
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