在全国科学大会上,华主席发出了“极大地提高整个中华民族的科学文化水平”的号召,我受到了很大鼓舞。去年,在美国作了一个时期的考察,更感到这个号召具有深远意义。现在,我们正在努力使我国的科学技术赶超世界先进水平。当提到世界先进水平或者一个国家的科学技术水平时,过去总是用有多少 At the National Science Conference, President Hua sent out a call for “greatly raising the scientific and cultural level of the entire Chinese nation.” I was greatly encouraged. Last year, during a period of study in the United States, I further felt that this call is of far-reaching significance. Now, we are trying hard to keep our country's science and technology catching up with the advanced world level. When it comes to the world's advanced level or a country's science and technology, the past always use how much