求翻译：肯尼迪于1961年1月20日正式宣誓就任美国第三十五任总统，他在就职演说中对国际事物给予了极大关注。他呼吁美国民众承担起更多的义务，做出更大的牺牲。是什么意思？

John F. Kennedy on January 20, 1961 officially sworn in as the thirty-fifth President of the United States, in his inaugural speech to give things a great deal of international attention. He called on Americans to assume more obligations, to make greater sacrifices.

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Kennedy took an oath officially in January 20, 1961 takes office American 35th president, he has given the enormous attention in the inaugural address to the international thing.He appealed the American populace undertake more duties, makes a bigger sacrifice.

Kennedy was formally sworn in on January 20, 1961 United States 35th President, in his inaugural speech to give great attention to international affairs. He called on the United States people assume more obligations, to make greater sacrifices.

John F. Kennedy on January 20, 1961 officially sworn in as the thirty-fifth President of the United States, in his inaugural speech to give things a great deal of international attention. He called on Americans to assume more obligations, to make greater sacrifices.