The six official languages of the United Nations,used in intergovernmental[3]meetings and documents,are Arabic,Chinese,English,French,Russian,and Spanish.The Secretariat uses two working languages,English and French.Four of the official languages are the national languages of the permanent members of the Security Council（the United Kingdom and the United States share English as a de facto official language）；Spanish and Arabic are the languages of the two largest blocs of official languages outside of the permanent members（Spanish being official in 20 countries,Arabic in 26）.Five of the official languages were chosen when the UN was founded；Arabic was added later in 1973.
聯合國有五大機構（曾經為六大，隨著聯合國最後一塊托管領土帕勞的獨立，托管理事會已於1994年停止運作）：聯合國大會、安全理事會、經濟及社會理事會、秘書處和國際法院。
其中，五大機構中有四個位於紐約市國際領土上的聯合國總部，國際法院則位於荷蘭海牙；其餘的主要機構的辦事處則位於日內瓦、維也納和奈洛比。其他的聯合國機構則遍及世界各地。
聯合國共有六種用於政府間會議和檔案管理的官方語言，它們分別為阿拉伯語、漢語、英語、法語、俄語和西班牙語。秘書處則使用英語和法語兩種語言為工作語言。其中四種官方語言均為安理會常任理事國的官方語言（其中英國和美國都將英語視為事實官方語言）；西班牙語和阿拉伯語則是除常任理事國外使用國家數最多的語言（西班牙語是20國的官方語言，阿拉伯語是26國的官方語言）。聯合國創建時的官方語言隻有五種，在1973年增加了阿拉伯語。
The General Assembly 聯合國大會
The General Assembly is the main deliberative assembly of the United Nations.Composed of all United Nations member states,the assembly meets in regular yearly sessions under a president elected from among the member states.Over a two-week period at the start of each session,all members have the opportunity to address the assembly. Traditionally,the Secretary-General makes the first statement,followed by the president of the assembly.The first session was convened[4]on 10 January 1946 in the Westminster Central Hall in London and included representatives of 51 nations.
When the General Assembly votes on important questions,a two-thirds majority of those present and voting is required.Examples of important questions include：recommendations on peace and security；election of members to organs；admission,suspension[5]，and expulsion[6]of members；matters.All other questions are decided by majority vote.and,budgetary[7]Each member country has one vote.Apart from approval of budgetary matters,resolutions are not binding on the members.The Assembly may make recommendations on any matters within the scope of the UN,except matters of peace and security that are under Security Council consideration.
聯合國大會是聯合國的主要審議機構，由所有聯合國成員國組成，每年定期舉行一次會議，由成員國選舉產生的主席主持。在會議開始後的兩周內，所有成員國均有機會在大會上演講。傳統上，秘書長會首先發表演說，然後則由大會主席發言。1946年1月10日，聯合國第一次會議在英國倫敦威斯敏斯特中央大廳舉行，共有51國代表出席。
聯合國大會在對重大問題表決時，需要三分之二多數的成員國讚成方可通過。此類重大問題包括：選舉機構成員，授予、暫緩或開除成員國資格以及預算事項等。其餘問題則需要多數成員國讚成才能通過。每個成員國都有一票可投。除了預算審批事項，決議對成員國不具有約束力。大會可以在聯合國框架內對任何事項提出建議，但和平和安全方麵的事項則由安全理事會審議。
The Security Council 安全理事會
The Security Council is charged with maintaining peace and security among countries.While other organs of the United Nations can only make“recommendations”to member governments,the Security Council has the power to make binding decisions that member governments have agreed to carry out,under the terms of Charter Article 25.The decisions of the Council are known as United Nations Security Council resolutions.
The Security Council is made up of 15 member states,consisting of 5 permanent members-China,France,Russia,the United Kingdom and the United States-and 10 non-permanent members.Thefive permanent members hold veto power over substantive[8]but not procedural[9]resolutions allowing a permanent member to block adoption but not to block the debate of a resolution unacceptable to it.Where the non-procedural resolution,the Council\\u0027s 15 members must be at least 9 votes in favor of the above,and the five permanent members did not vote to pass one country,that is to vote against the permanent members are often called veto.The ten temporary[10]seats are held for two-year terms with member states voted in by the General Assembly on a regional basis.The presidency of the Security Council isrotated alphabetically each month.
安全理事會的職責是維護國與國間的和平和安全。與聯合國其他機構隻能對成員國提出“建議不同，安全理事會有權對承諾履行憲章第25條的成員國作出約束性決議。理事會的決議被稱為聯合國安全理事會決議。”