b. this international organization is not subject to manipulation by any other country.

c. All substantive issues should be subject to the principle of "unanimity of major powers";
d.It aims at promoting social progress and improving people's living standards.
e.Big organization, not very efficient

4，
a, the United Nations general assembly (GeneralAssemblyoftheUnitedNations -- UNGA) hereinafter referred to as "the general assembly", is a major review of the UN, supervision and censorship. Composed of all Member States.

b, The United Nations SecurityCouncil (SC) (SecurityCouncil for short) is one of the six major organs of the United Nations. The duty of the Security Council is to maintain peace and security among nations.

c. The United Nations Economic and Social Council (ECOSOC) assists the General Assembly in promoting international economic and social cooperation and development.

d. The TrusteeshipCouncil (TC) is the principal organ of the United Nations in implementing the international trusteeship system. The lands applicable to international trusteeship are those of the former League of Nations that were not yet independent at the end of the Second World War and those that were seceded from enemy States after the war.

e, The International Court of Justice (ICJ), located in The Hague, the Netherlands, is the principal judicial organ of the United Nations. It was established by the Charter of the United Nations in 1945 and began operation in 1946 as a successor to the Permanent International Court of Justice. The International Court of Justice consists of 15 judges appointed by the General Assembly for a nine-year term and must be from different countries.

f. The Secretariat of the United Nations, which is engaged in the daily work of the United Nations and serves other major organs of the United Nations.

5,The latest outbreak of novel coronavirus. The role of the United Nations is decision-making. Recently, the United Nations has adopted the COVID-19 prevention and control resolution, which mainly calls for close cooperation between health and medical institutions around the world. Meanwhile, it also advocates putting people first, rejecting racial discrimination and advocating a global ceasefire so that the world can restore calm. To a certain extent, this resolution can take effective measures. Timely cooperation can better deal with the global epidemic.