求翻译：肯尼迪的就职演说与富兰克林·德拉诺·罗斯福的第一次就职演说被并称为20世纪最令人难忘的两次美国总统就职演说，共计1355个单词的演说成为激励型语言和呼吁公民义务的典范之作。是什么意思？

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John F. Kennedy's inaugural address and Franklin Delano Roosevelt's first inaugural speech are known as the most unforgettable of 20th Century United States presidential inauguration speech twice, for a total of 1355 word speech become incentive language and called for an example of civic obligation

Kennedy's inaugural address and the Franklin · Delano · Roosevelt's first inaugural address bingcheng is 20th century most unforgettable two US presidents the inaugural address, the total 1355 word speeches become the drive language and appeal the civic duty work model.

Kennedy's inaugural address and Franklin Delano Roosevelt first inaugural and as the 20th century's most memorable two United States presidential inauguration, a total of 1355 Word speech as incentive-based language, and called for an outstanding example of civic duty.

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