这篇雅思阅读材料的主要内容是美国总统在欢迎胡主席访美仪式上致辞。1月19日，美国总统在华盛顿白宫举行隆重仪式，欢迎中国国家主席胡锦涛对美国进行国事访问。以下是美国总统在欢迎仪式上的致辞：

　　Remarks by President Obama at Official Arrival Ceremony

　　South Lawn

　　9:20 A.M. EST

　　PRESIDENT OBAMA: Good morning, everyone. President Hu, members of the Chinese delegation, on behalf of Michelle and myself, welcome to the White House. And on behalf of the American people, welcome to the United States.

　　Three decades ago, on a January day like this, another American President stood here and welcomed another Chinese leader for the historic normalization of relations between the United States and the Peoples Republic of China. On that day, Deng Xiaoping spoke of the great possibilities of cooperation between our two nations.

　　Looking back on that winter day in 1979, it is now clear. The previous 30 years had been a time of estrangement for our two countries. The 30 years since have been a time of growing exchanges and understanding. And with this visit we can lay the foundation for the next 30 years.

　　At a time when some doubt the benefits of cooperation between the United States and China, this visit is also a chance to demonstrate a simple truth. We have an enormous stake in each others success. In an interconnected world, in a global economy, nations -- including our own -- will be more prosperous and more secure when we work together.