标准英语听说【15】

The United States has become the undisputed leader of the high - technology industry. One of the keys to America's leadership has been its ability to attract some of the brightest engineers and business people from around the world, particularly from developing countries.

US - based technology centers, particularly Silicon Valley in California, are dominated by two main ethnic groups; Indians and Chinese. These groups include some of the most successful entrepreneurs and innovative engineers in the high - technology industry, representing billions of dollars in new companies and products.