China's scientific and technological progress has attracted worldwide attention. In 2010, China's total human resources in science and technology ranked first in the world, the number of international scientific and technological papers ranked second in the world, and the number of invention patents ranked third in the world . but the survey showed that China's talent capital The contribution rate of economic growth is much lower than that of Western countries, and the external dependence of key technologies is significantly higher than that of Western countries. What is the main message of this text? ['Lack of support for key core technologies has become a bottleneck in technological development.', "China's independent innovation ability in science and technology development is not strong and its research foundation is weak.", "China's scientific and technological strength has developed rapidly and achieved many important results.", 'China has become a big country in science and technology, but there is still a large gap with developed countries.']