资讯
In 2024, the United States spent nearly 1 trillion dollars, roughly 3.5 percent of total economic output, on research and development. When it came to the kind of long-term basic research that ...
U.S. President Donald Trump held a meeting on Wednesday with Syrian interim leader Ahmed al-Sharaa in Riyadh, Saudi Arabia, ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果