联合国是一个由主权国家组成的国际组织，旨在维护国际和平与安全、促进国际合作与发展。联合国成立于 1945 年，在第二次世界大战前，存在着一个类似于联合国的组织国际联盟。在 1945 年 10 月 24 日，联合国在美国加州旧金山签定生效的《联合国宪章》，标志着联合国正式成立。
联合国共有 193 个成员国，到 2011 年为止，经历了多次重要历史事件，例如 2001 年的“9·11”恐怖袭击、2008 年的北京奥运会、2011 年的利比亚危机等。联合国一直致力于推动全球范围内的合作，包括通过维和行动维护世界和平、促进全球发展合作、推动人权保护等领域。
在联合国的历史中，也曾出现过一些重要的事件，例如 1993 年的“维和行动”，2000 年的“防止核扩散条约”等。联合国成为了全球范围内最重要的多边合作平台之一，为维护世界和平、促进人类发展作出了重要贡献。
英文翻译：
United Nations celebrates 70th anniversary: From International 联盟 to UN
Keywords: UN, founding, history
The United Nations is an international organization composed of sovereign states, aiming to maintain international peace and security, promote cooperation and development. The UN was established in 1945, and the United Nations Charter was signed into force on October 24, 1945, in San Francisco, California.
With 193 member states, the UN has undergone several significant historical events, such as the September 11 terrorist attacks in 2001, the Beijing Olympics in 2008, and the Libyan crisis in 2011. The UN has been committed to promoting cooperation in various fields, including peacekeeping operations, promoting global development, and protecting human rights.
In the history of the UN, there have also been some important events, such as the United Nations peacekeeping operations in 1993 and the Treaty on the Prohibition of Nuclear Weapons in 2000. The UN has become one of the most important multilateral cooperation platforms, contributing to maintaining world peace and promoting human development.
【来源】https://baike.so.com/doc/3042615.html
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