What Is the Summit For？ 什么是G20峰会？ G20如何解释、英文意义怎样？
G-20一词的“正式”出现是在2003年8月13日的一份文字发表回应中，这是一份由欧洲共同体（European Communities，EC）与美国针对坎昆与会的部长所提出的农产品共同提案。到了2003年8月20日，一份由20个国家所签署的文件，之后并重新发布，此份文件针对之前欧盟与美国的农产品提案提出另一个可行的替换框架（Framework），此文件标示著是由G-20所订立。
On April 2 2009, world leaders from the G20 countries - representing 85% of the world's output - will meet in London. They will meet against the backdrop of the worst international banking crisis in generations.
Confidence in the international banking system has fallen. Major institutions have failed. Countries around the world have entered recession, with falling trade and rising unemployment.
At the Summit, countries need to come together to enhance global coordination in order to help restore global economic growth. World leaders must make three commitments:
First, to take whatever action is necessary to stabilise financial markets and enable families and businesses to get through the recession.
Second, to reform and strengthen the global financial and economic system to restore confidence and trust.
Third, to put the global economy on track for sustainable growth.
The London Summit will take place against the backdrop of exceptionally challenging economic circumstances. But, just as after the Second World War visionary leaders laid the groundwork for 30 years of prosperity and growth, built on international economic cooperation, this crisis is also an opportunity.
The world's leading economies can come together and lay the foundations not just for a sustainable economic recovery, but also for a genuinely new era of international economic partnership - a global deal, in which all countries have a part to play and all will see the benefits.
G-20的核心会员主要有四个国家：中国(只含大陆)、印度、巴西、以及南非，此也经常合称为G4 bloc，bloc为“团体、联盟、集团”之意。