In the case of a work of joint authorship, such term shall expire on December 31 of the fiftieth year after the death of the last surviving author.是什么意思_In the case of a work of joint authorship, such term shall expire on December 31 of the fiftieth year after the death of the last surviving author.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句